** Drinking Trough for Chickens [454]

A quickly made and sanitary drinking trough for chickens is formed of a piece of ordinary two or three-ply roofing paper. The paper is laid out as shown, and the edges are cemented with asphaltum and then tacked to the side of a fence or shed.



** Ordinary Pen Used as a Fountain Pen [454]

It is a very simple matter to make a good fountain pen out of an ordinary pen and holder. The device is in the form of an attachment readily connected to or removed from any ordinary pen and holder, although the chances are that when once used it will not be detached until a new pen is needed.

Take the butt end of a quill, A, from a chicken, goose or turkey feather—the latter preferred as it will hold more ink—and clean out the membrane in it thoroughly with a wire or hatpin. Then make a hole in the tapered end of the quill just large enough to pull through a piece of cotton string. Tie a knot in one end of this string, B, and pull it through the small end of the quill until the knot chokes within, then cut off the string so that only 1/4 in. projects. Shave out a small stopper from a bottle cork for the large end



of the quill. This completes the ink reservoir.

Place the quill on top of the penholder C, so that its small end rests against the pen immediately above its eye. Pull the string through this eye. Securely bind the quill to the pen and holder with a thread, as shown, first placing under it a wedge-shaped support of cork or wood, D, hollowed on both sides to fit the curved surfaces of the quill and holder. The illustration shows the detail clearly.

To fill the reservoir place the pen upright on its point and dip a small camel's-hair brush or cloth-bound toothpick into the ink bottle and "scrape" off the ink it will hold on the inner edge of the quill. Cork tightly, and the device is ready for use. When not in use place the holder at an angle with the pen uppermost. —Contributed by Chelsea C. Fraser, Saginaw, Michigan.



** How to Construct a Small Thermostat [455] By R. A. McCLURE

It is a well known fact, that there is a change in the dimensions of a piece of metal, due to a change in its temperature. This change in dimensions is not the same for all materials; it being much greater in some



materials than in others, while in some there is practically no change.

If two thin, narrow strips of different metals, that contract or expand at different ratio due to a variation in temperature, be rigidly fastened together at their ends, and the combination then heated or cooled, the combined piece will have its shape changed. One of the pieces will increase in length more than the other, due to a rise in temperature, and this same piece will decrease in length more than the other when subjected to a decrease in temperature.

If one end of this combined piece be rigidly clamped to a support, as shown in Fig. 1, and the combination then have its temperature changed, the free end will move to the right or left of its original position, depending upon which of the pieces changes in length the more. If there is a rise in temperature and the right-hand piece B increases in length faster than the left-hand piece A, the free end of the combined piece win move to the left of its original position. If, on the other hand, there is a decrease in temperature, the right-hand piece will decrease in length more than the left-hand piece, and the upper or free end will move to the right of its original position.

Such a combination of two metals constitutes a simple thermostat. If the movement of the free end of the combination be made to actuate a needle moving over a properly calibrated scale we have a simple form of thermometer. If two electrical contacts, CC, be mounted on the right and left-hand sides of the upper end of the combined piece, as shown in Fig. 1, we have a thermostat that may be used in closing an electrical circuit when the temperature of the room in which it is placed rises or falls a certain value. These contacts should be so arranged that they can be moved toward or away from the combined piece independently. By adjusting the position of these contacts, the electrical circuit will be closed when the temperature of the thermostat has reached an experimentally predetermined value.

The following description is that of a thermostat, constructed by the author of this article, which gave very satisfactory results. First obtain a piece of steel, 6 in. long, 5/8 in. wide and 2/100 in. thick, and a piece of brass, 6 in. long, 5/8 in. wide and 3/100 in. thick. Clean one side of each of these pieces and tin them well with solder. Place the two tinned surfaces just treated in contact with each other and heat them until the solder on their surfaces melts and then allow them to cool. A better way would be to clamp the two thin pieces between two heavy metal pieces, and then heat the whole to such a temperature that the solder will melt, and then allow it to cool. This last method will give more satisfactory results than would be obtained if no clamps are used, as the thin metal pieces are liable to bend



out of shape when they are heated, and as a result they will not be in contact with each other over their entire surfaces. After these pieces have been soldered together forming one piece, which we shall for convenience speak of as the couple, two small holes should be drilled in one end to be used in mounting it, and a notch cut in the other end, as shown in Fig. 2.

Cut from some thin sheet brass, about 2/100 in. in thickness, two pieces, 1/4 in. wide and 1/2 in. long. Bend these pieces of brass over a piece of hatpin wire, thus forming two V-shaped pieces. Cut off a piece of the hatpin, 5/8 in. long, and fasten it across the notched end of the couple by means of the U-shaped piece of brass, which should be soldered in place as shown in Fig. 3. All superfluous solder should then be cleaned from the couple and the steel pin. Now bend the couple so as to form a perfect half circle, the brass being on the inside.

The base upon which this couple is to be mounted should be made as follows: Obtain a piece of brass, 7 in. long, 3/4 in. wide, and 1/4 in. thick. In this piece drill holes, as indicated in Fig. 4, except A, which will be drilled later. Tap the holes B, C and D for 1/8-in. machine screws.

Cut from some 1/8-in. sheet brass a piece, 1-7/8 in. long and 3/4 in. wide, to be used as a support for the couple. In one end of this piece drill two small holes, as indicated in Fig. 5, and tap them for 3/16-in. machine screws. In the opposite end cut a slot, whose dimensions correspond to those given in Fig. 5. Now bend the piece, at the dotted line in Fig. 5, into the form shown in Fig. 6, making sure that the dimension given is correct. This piece can now be mounted upon the piece shown in Fig. 4, by means of two brass machine screws placed in the holes B. The slot in the support for the couple will permit its being moved along the mounting strip, the purpose of which will be shown later.

Next cut another piece of 1/8-in. brass, 2-3/4 in. long and 5/8 in. wide. In this piece drill two 1/8-in. holes, as indicated in Fig. 7, and then bend it at the dotted lines into the form shown in Fig. 8. Mount this strip upon the main mounting strip by means of two brass machine screws placed in the holes C, so that the upper part is over the center-punch mark for the hole A in the main mounting strip.

You are now ready to drill the hole A, which should be done as follows: Remove the piece you last mounted and then clamp the main mounting strip in the drill press so that the center-punch mark for the hole A is directly under the point of the drill. Then remount the piece you just removed, without disturbing the piece you clamped in the drill press, and drill a small hole through both pieces. This hole should be about 3/64 in. in diameter. After this small hole has been drilled through both pieces, a countersink should be placed in the drill chuck and the hole in the upper piece countersunk to a depth equal to half the thickness of the metal in which it is drilled. Unclamp the pieces from the drill press, turn them over, and countersink the small hole in what was originally the lower piece. The object of countersinking these holes is to reduce the bearing surface of a small shaft that is to be supported in the holes and must be as free from friction as possible.

We may now construct the needle, or moving portion of the thermostat, which should be done as follows: The shaft that is to carry the moving system must be made from a piece of steel rod, about 3/32 in. in diameter. Its dimensions should correspond to those given in Fig. 9. Considerable care should be used in turning this shaft down, to make sure that it fits perfectly in the small holes in the supporting pieces. The shaft should turn freely, but it must not be loose in the holes, nor should it have but a very small end play.

Cut from some 1/32-in. sheet brass a piece whose dimensions correspond to those given in Fig. 10. Drill a 1/8-in. hole, A, in this piece, and cut a slot, B, from one side of the piece into this hole, and a second slot, C, along the center of the piece as indicated in the figure. Considerable care should be exercised in cutting the slot C, so that its breadth is exactly equal to the diameter of the piece of steel wire fastened on the end of the couple. Also make sure to get the sides of this slot perfectly smooth. Cut from some 1/8-in. brass a disk having a diameter of 1/2 in., and solder it to the end of the needle. The dotted line in Fig. 10 indicates the proper position of the disk. Now drill a hole, D, through the disk and needle, of such a diameter that considerable force must be applied to the steel shaft you have already made, in order to force it through the hole. Force the shaft



through this hole until the needle is exactly in the center of the shaft.

The parts of the thermostat thus far made can now be assembled. Place the steel shaft in its bearings and see that it turns perfectly free. Then place the steel pin, on the end of the couple, in the slot C, and fasten the



other end of the couple, by means of two machine screws, to the support made for the couple. Increase or decrease the temperature of the thermostat and note the results. If everything is working all right, the end of the needle should move when the temperature of the thermostat is changed. The amount the end of the needle moves can be easily changed by moving the support or the couple toward or away from the shaft supporting the needle, which changes the position of the steel pin in the slot C. The nearer the steel pin is to the shaft supporting the needle, the greater the movement of the end of the needle due to a given change in temperature.

A small piece of white cardboard can be mounted directly under the end of the needle by means of small brass strips, that in turn can be attached to the lower ends of the main mounting holes D, Fig. 4. A scale can be marked on this piece of cardboard by noting the position of the needle corresponding to different temperatures as determined by a thermometer. When this scale has been completed, you can use the thermostat as a thermometer.

Two contacts may be mounted, one on each side of the needle, in a manner similar to the method suggested for mounting the cardboard. These contacts should be so constructed that the end of the needle will slide over them with little friction, and so that their position with respect to the end of the needle may be easily changed.



Both contacts must be insulated from the remainder of the thermostat, and may or may not be connected together, depending on how the thermostat is to be used.

It would be advisable, if possible, to have the part of the needle that touches the contact points, as well as these points, of platinum, as the arc that is likely to be formed will not destroy the platinum as easily as it will the brass. A small wooden containing case can now be made and the thermostat is complete. There should be a large number of holes drilled in the sides, ends and back of the case so that the air inside may be always of the same temperature as the outside air.

In adjusting, testing, or calibrating your thermostat, make sure that it is in the same position that it will be in when in use.

The connections of the thermostat for ringing one bell when the temperature rises or falls to a certain value, are shown in Fig. 11. The connections of the thermostat for ringing one bell when the temperature rises to a certain value and another bell when the temperature falls to a certain value, are shown in Fig. 12. The complete thermostat is shown in Fig. 13.



** A Tailless Kite [458]

The frame of a 3-ft. kite is made of two sticks, each 3 ft. long. These are tied together so that the cross stick will be at a distance of 15 per cent of the full length of the upright stick, from its end, or in this case 5.4 in. The sticks may be made of straight grained pine, 3/8 in. square, for small kites, and larger hardwood sticks, for larger kites.

The cross stick is bent into a bow



by tying a strong cord across from end to end. The center of the bend should be 4-1/2 in. above the ends. The bend is shown in the sketch. Connect all four ends or points with a cord, being careful not to pull the bend of the cross stick down, but seeing that it remains straight across the kite. When this is done the frame is ready for the cover.

The cover will require 2-1/2 sheets of tissue paper, 20 by 30 in., which should be pasted together as the sketch indicates. Cut out the paper, allowing 2 in. margin for lapping over the cord on the frame. Place the frame on the cover with the convex side toward the paper and paste the margin over the cord, allowing the paper to bag a little to form pockets for the air to lift the kite. The corners should be reinforced with circular pieces of paper pasted over the ends of the sticks.

The flying cord is attached to the points A and B of the frame. There is no cross cord. The kite will fly at right angles to the flying cord. It is easily started flying from the ground by laying it with the head toward the operator and pulling it up into the wind. —Contributed by Chas. B. Damik, Cooperstown, N. Y.



** The Levitation - A Modern Stage Trick [459]

This illusion has mystified thousands of the theater-going public, in fact, it has been the "piece de resistance" of many illusion acts. The ordinary method of procedure is as follows: The person who is to be suspended in the air, apparently with no support—usually a lady—is first put in a hypnotic (?) sleep. She is placed on a couch in the middle of the stage, and in most cases the spotlight is brought into play. The performer then takes a position close to the couch and with dramatic



effect makes a few hypnotic passes over the subject. She then slowly rises from the couch until she has attained a height varying from 4 to 5 ft. above the stage, as shown in Fig. 1. The couch is then taken a way and a hoop is passed over the floating lady. The performer now causes the lady to float back to the couch or board that she may have been resting on, after which the so-called hypnotic spell is withdrawn.

In spite of the claims that the illusion owes its origin to Hindoo magic, it is nothing more nor less than a clever mechanical contrivance, the construction of which will be readily understood by a glance at the accompanying illustrations.

The bottom of the couch, if one is used, contains a cradle-like arrangement which fits the recumbent form of the lady and is connected to a heavy sheet of plate glass by means of a rod, D, Fig. 2, attached to one end, and running parallel to the side of the cradle. When the glass is lifted, the body of the subject is also raised, seemingly at the will of the performer. This is accomplished by the aid of an assistant beneath the stage floor. The plate of glass, E, Fig. 3, passes perpendicularly through the stage down to a double block and tackle. The end of the cable is attached to a drum or windlass and the plate glass held steady with guides at the sides of the slot in the stage floor, through which it passes. The winding up of the cable naturally forces the plate glass and cradle up, causing the lady to rise.

Some illusionists place the lady on a board on two ordinary trestles and cause the board to rise with the lady



on it, as shown in the illustration, thus obviating the use of heavy paraphernalia as in the cradle attachment. The cradle attachment is also generally accompanied by a 2-in. iron bar, used in the place of the plate glass, the performer or operator standing at the rear of the couch to conceal the bar as it comes from beneath the stage. However, the method illustrated is the one generally used.

The solid hoop is passed over the body in the following manner: Start at the end, B, Fig. 2, passing the hoop as far as C with the hoop on the outside of the back horizontal rod. The side of the hoop toward the audience is then turned and swung clear around over the feet at A and entered between the rod and board on which the lady rests. The hoop is then carried as far as it will go back toward the end B. Then the side nearest the operator is passed over the head of the body apparently the second time and passed off free at the feet. Thus to the closest observer the impression is given that the hoop has encircled the lady twice. The illustrations give in detail the working of the illusion above the stage floor. No set rule is used for the tackle and drum below the floor.



CONTENTS

A Accelerometer, Simple 93 Acid Burns, Treating 126 Acetylene Gas Generator, Homemade 57 Acetylene Lamp, Lighting 401 Aerating Water in a Small Tank 241 Aeroplane, Paper, How to Make 329 Aeroplanes, Model, Equilibrator for 11 Alarm, Burglar, How to Make 368 Alarm, Callers' Approach 87 Alarm Clock Chicken Feeder 79 Alarm Clock to Pull Up Furnace Draft 107 Alarm, Electric 94 Alarm, Electric, Door Bell and 114 Alarm, Electric Fire, How to Make 430 Alarm, Electric, That Rings Bell and Turns On Light 337 Alarm, Electric Time 433 Alarm, Fire 47, 359 Aluminum Polish 428 Aluminum, Satin Finish on 198 Aluminum Wire, Insulating 306 Ammeter, How to Make 49, 203 Amusement-Boys Representing the Centaur 173 Amusement Device—Merry-Go-Round Thriller 209 Amusement Device—Merry-Go-Round, To Build 359 Amusement Device—Teeter Board. Revolving 297 Anesthesia, Electric 445 Animals, Small, Trap for 82 Annealing Chisel Steel 362 Annunciator, How to Construct 57, 416 Aquarium, How to Make 64, 210 Arbor, Grape, How to Build 73 Arc Lamp, Homemade 132 Arc Searchlight, Self Lighting 9 Arms and Armor, Imitation: Part I 235 Part II 242 Part III 248 Part IV 263 Part V 271 Part VI 279 Part VII 284 Arms, Drip Shield for 258 Arrowhead, Flint, How to Make 23 Asbestos Table Pads, Homemade 212 Athletes, Weights for, How to Make 274 Atomizer, How to Make 158 Automobile, Boys' Homemade 402, 430 Automobile Engine, Cooling Water for 236 Automobile, Greasing the Front Wheels of 320 Automobile Headlights, Adjusting 217 Automobile, Painting 357 Automobile with Sails 326 Axle, Cart without 291

B Babbitt Ladle, Emergency 264 Babbitt, Ladle for Melting 173 Bag, Changing, for Plate Holders 212 Bag, Sewing, How to Make 386 Bags, Paper, Use for 19 Balloon Ascension Illusion 300 Balloon, Pilot, How to Make 118 Balloons, Paper, How to Make 215 Barometer, Homemade 151 Barometer, How to Make 188 Barrel Stave Hammock 75 Barrel Stave Sled 383 Baseball, Playing with a Pocket Knife 250 Baseball Throwing Practice, Device for 312 Bath. Shower, To Make 15 Bathtub Stopper, Substitute 429 Batteries, Connecting Up to Give Any Voltage 93 Batteries, Dry, To Obtain Cheaply 410 Batteries, Dry, To Renew 369, 378, 401 Batteries, Gravity, Why Fail 115 Battery Binding Posts, Wire Loop Connections for 449 Battery Cell. Dry, Making 160 Battery Connections, Wire Terminals for 168 Battery, Grenet, How to Make 83 Battery Motor, Controller and Reverse for 72 Battery Motor, Reversing 405 Battery, Non-Polarizing, How to Make 151 Battery Rheostat 80, 445 Battery, Small Storage, How to Make 121 Battery Switch 99 Battery, Thermo-Electric, How to Make 59, 140 Battery Voltmeter 153 Battery Zincs, Old, To Use 87 Bed Warmer. Electric, How to Make 338 Beeswax, Substitute for 129 Bell, Cracked, Restoring Tone to 71 Bell, Return Call, with One Wire 101 Bell Ring Register 316 Bell, Ringing by Touching a Gas Jet 403 Belt, Eyelets for 432 Belt Lace Caution 239 Belt, Round, To Make without Ends 243 Bench Lathe Made of Pipe Fittings 316 Bicycle Catamaran 145 Bicycle Coasting Sled, How to Make 231 Bicycle Frame, Enameling 385 Bicycle, Runners on 157 Bicycle, To Attach a Sail to 425 Bicycle, Trailer for 397 Bicycle Trouser Guards for Sleeve Bands 283 Bicycle. Water, How to Make 335 Bill File Made of Corkscrews 315 Bind Magazines, To 40, 56, 406 Bird House, Proper Design for 201 Bird Houses, Clay Flower Pots Used for 277 Bit, Gouge Used as 411 Blotter Pad, Corner Pieces for 8 Blotting Pad, Desk 17 Blowpipe, Homemade 428 Blueprint Lantern Slides, How to Make 120 Blues, prussian and Chinese 401 Boards, Joining 268 Boat-Bicycle Catamaran 145 Boat-Canoe, How to Make 451 Boat-Catamaran, Cruising 423 Boat, Ice, How to Build 357, 382 Boat, Paddle, How to Make 100 Boat, Paper, How to Make 321 Boat-Punt, Homemade 123 Bobsled, Homemade Yankee 408 Bolts, Rusted 151 Book Cover, Paper, How to Make 126 Book Holder 32 Book, Removing Grease Stains from 230 Book Rest 292 Bookcase Doors, To Keep Closed 377 Bookmark 379 Bookmark, Brass 18 Bookmark, Paper Clip 241 Books. How to Carry 409 Boomerangs, How to Make 4, 202 Bore a Square Hole, How to 179 Boring Holes In Cork 8 Bottle, Cutting Thread inside of 179 Bottle, Diving 331 Bottle, Inverted, Withdrawing Paper from Under 33 Bottle, Photographing Man in 74 Bottle Pushing on the Ice 409 Bottles, Round End. Base for 29 Bottle Stopper, New Way to Remove 224 Bowl, Copper, How to Make 185 Box Cover. Sliding, Fastener 256 Box, Fishhook 379 Box, Magic 7 Box, Water Color 257 Boxes, Rustic Window 30 Bracket Saw, Cheap, How to Make 42 Brass Bookmark 18 Brass, Cleaning 407 Brass Flag, Ornamental, How to Make 266 Brass Frame In Repousse 237 Brass Furnace, How to Build 115 Brass, Piercing Punch for 19 Brass Plaques, Photo Silhouette, Making 217 Brass Surface, Flat, Polishing 229 Brass Work-Candlestick, How to Make 325 Bread, Loaf, Cutting 36 Bronze Liquid 329 Brooder for Small Chickens 343 Broom Holder 13 Broom Holder Made of a Hinge 33 Broom, Old, Crutch Made of 352 Brush, Counter, for a Shop 419 Brush, To Keep from Spreading 367 Brushes, Paint, Care of 267 Bulb on a Glass Tube, To Make 324 Bunsen Cell, How to Make 206 Burglar Alarm, Simple, How to Make 368 Burning Inscriptions on Trees 45 Burns, Carbolic Acid 126 Button, Changing into a Coin 234 Button. Removing from Child's Nostril 237 Buttonhole Trick 234

C Cabinet for Pot Covers 16 Cabinet for Phonograph Records 483 Cabinet, Music, How to Make 77 Cabinet, Phonograph Disk Cabinet 79, 433 Calendar, Handy 196 Calliope, Steam, How to Make 418 Camera, Box, Repairing 379 Camera, Enlarging from Life in 111, 117 Camera, Homemade Kits for 159 Camera, Making Light proof 58 Camera, Practical, for Fifty Cents 365 Camp Stool, How to Make 222 Camp, Tin Drinking Cup for 379 Camper's Lantern, Makeshift 266 Camps and How to Build Them 341 Camps, Keeping Food Cool in 21 Can Covers, Tool for Lifting 352 Candle Shade, How to Make 191 Candlestick, How to Make 240, 281, 325 Candlestick, Water 406 Cane Chairs, How to 259 Cane in Furniture, Tightening 230 Cannon Balls, 36, Removing from Handbag 256 Cannon, Gas 197 Cannon, How to Make 42 Cannon, Lead, How to Make 338 Cannon, Toy, To Discharge by Electricity 59 Canoe, How to Make 451 Canoe, Sailing, How to Make 199 Cans, Tomato, Irrigating with 450 Canvas Cot, Folding, How to Make 154 Canvas, Waterproofing 146 Carburetor Difficulties 208 Card Trick, Rising 256 Card Trick with a Tapered Deck 70 Cardboard Spiral Turned by Heat 226 Cardboard Squares. Gun for Throwing 269 Cardcase, Lady's, How to Make 350 Cards, Mechanical Trick with 63 Carpenter's Gauge 19 Carpenter's Vise, Homemade 36 Carpet Sweeper Wheels, New Tires for 266 Cart, Dog 60 Cart without an Axle 291 Catamaran, Bicycle 145 Catamaran, Cruising 423 Catapult, Fourth of July 447 Cats, Shocking, Device for 411 Cell, Bunsen 206 Cell, Daniell 252 Centaur. Boys Representing 173 Centering, To Make Unnecessary 319 Chain Made from a Match 377 Chair, Child's Footrest on 453 Chair Legs. Rubber Tip for 229 Chair, Porch Swing 128 Chair Rockers, Safety Tips on 429 Chair Sleighs 383 Chairs, Balancing on 131 Chairs, To Cane 259 Checker Board Puzzle 189, 233 Cheese box Cover, Tea Tray 18 Chemicals. Protecting Fingers from 283 Cherry Seeder 29 Chicken Coop. Keeping Rats from 352 Chickens, Drinking Trough for 454 Chickens, Feed Box for 292 Chickens. Small, Brooder for 343 Chisel, Ice 61 Chisel, Steel, Annealing 362 Chopping Board 19 Christmas Tree Decorations, Repairing 11 Churn, Homemade Small 192 Clamp, Magazine, How to Make 435 Clamping a Cork 33 Clamps, Homemade Soldering 137 Cleaner for Gloves 302 Cleaner for White Shoes 239 Cleaning Brass 407 Cleaning Discolored Silver 344 Cleaning Furniture 185 Cleaning, Glass, Solution 31 Cleaning Jewelry 353 Cleaning Leather on Furniture .13 Cleaning Silver 305 Cleaning Walls 375 Cleaning Woodwork 315 Cleats, Insulating, Substitute for 348 Clock, Electric, How to Make 268 Clock, Homemade Novelty 446 Clock, How to Clean 119 Clock, Novelty, for the Kitchen 360 Clock, Old, Use for 367 Clothes Rack 14 Clothesline, Double, Support for 318 Coaster, Roller, Illusion 298 Coaster, Trolley, How to Make 387 Coasters and Chair Sleighs 383 Cock, 'l'hree Way, for Small Model Work 50 Coil. Jump Spark 113 Coils, Forming to Make Flexible Wire Connections 443 Coin and Card on the First Finger 175 Coin and Tumbler Trick 378 Coin, Changing Button Into 234 Coin, Disappearing 176, 193 Coin In a Wine Glass Trick 167 Coin, Moving under a Glass 214 Coin Purse, How to Make 354 Coin, Sticking against Wall 176 Coin, Sticking to Wood by Vacuum 287 Coins, Display Rack Shows Both Sides of 220 Coins, Sending by Mail, Safe Method of 287 Compass, Mariner's 170 Compass Needle, Floating 160 Compass, Substitute for 289 Compressed Air Phenomenon 111 Concrete Kennel 23 Concrete Swimming Pool 178 Conservatory, Window 103 Controller for a Small Motor 42 Cook Fish, One Way to 206 Copper Bowl, How to Make 185 Copper, Hardening 206 Copper Picture Frame, Etched, How to Make 414 Copper Trays, How to Make 180 Copper Work—Corner Pieces for a Blotter Pad 8 Cord. Buttoned 427 Cork, Boring, Holes in 8 Cork, Clamping 33 Cork Extractor 300 Corks, How to Fit 368 Corkscrews, Bill File Made of 315 Corner Pieces for a Blotter Pad, How to Make 8 Cot. Canvas, How to Make 154 Counter Brush for a Shop 419 Crossbow and Arrow Sling, How to Make 339 Crutch. Homemade 369 Crutch Made of an Old Broom 352 Crystallization, Instantaneous 288 Cup and Saucer Rack, How to Make 105 Cup, Tin Drinking, for the Camp 379 Current Reverser 107, 111 Curtain Roller 419 Curtain Roller Spring, How to Tighten 79

D Dance, Miniature War 255 Darkroom Lantern, Homemade 14, 340 Darkroom, Photographic, Building 26 Demagenetizing a Watch 166 Desk Blotting Pad 17 Developing Box, How to Make 220 Developing Tray, Cracked Composition, To Repair 260 Developing Tray. Photographic 269 Dish Holder, Hot 7 Dogcart, Homemade 160 Dog, How to Chain 257 Dog's Bark, Drowning with Water 435 Dogs, To Drive Away 106 Door Bell and Electric Alarm 114 Door Lock, Secret 6 Door Opener, Electric 78 Door Opener for a Furnace 83 Door, Sliding, Electric Lock for 89 Dovetail Joint 29 Dovetail Joint Puzzle 236 Draft Opener, Automatic 102 Draftsman. Spline for 406 Draftsmau's Ink Bottle Cork, Steel Pen Used In 117 Drawers, Several, Locking with One Lock 314 Drawing, Aid In 270 Drawing Instrument-Wondergraph, How to Make 436 Drawing, Landscape, Made Easy 449 Drill Gauge, Handy 252 Drill, Hand, How to Make 444 Drinking Cup, Tin, for the Camp 379 Drinking Trough for Chickens 454 Drip Shield for the Arms 258 Dry Batteries, Another Way to Renew 378 Dry Batteries, Cheap, How to Obtain 410 Dry Batteries, Old, To Renew 401 Dry Batteries, Renewing 367 Dry Battery Cell, How to Make 160 Duplicator for Box Cameras 363 Duplicator, Homemade 240

E Easel, How to Make 415 Egg-Beater, How to Make 291 Eggshell Funnel 93 Eggshells, How to Preserve 288 Elderberry Huller, Homemade 323 Electric Alarm 94 Electric Alarm, Door Bell and 114 Electric Alarm That Rings a Bell and Turns On a Light 337 Electric Anesthesia 445 Electric Apparatus-Ammeter, How to Make 49, 203 Electric Apparatus-Annunciator, Homemade 57 Electric Apparatus-Annunciator, How to Construct 416 Electric Apparatus-Batteries, Connecting Up to Given Any Voltage 93 Electric Apparatus-Battery Rheostat 80 Electric Apparatus-Battery Voltmeter 153 Electric Apparatus-Bell, Return Call, with One Wire 101 Electric Apparatus-Cats, To Shock 411 Electric Apparatus-Cell, Daniell 252 Electric Apparatus-Circuit Breaker for Induction Coils 101 Electric Apparatus-Controller and Reverse for Battery Motor 72 Electric Apparatus-Controller for a Small Motor 42 Electric Apparatus-Current Reverser 107, 111 Electric Apparatus-Galvanometer, Tangent 150 Electric Apparatus-Induction Coil, How to Make 138 Electric Apparatus-Induction Coils, Mercury Make and Break Connection for 187 Electric Apparatus-Jump Spark Coil 113 Electric Apparatus-Medical Induction Coil, How to Make 63 Electric Apparatus-Motor, Single Phase Induction 124 Electric Apparatus-Motors, Direct Connected Reverse for 60 Electric Apparatus-Rheostat, Lead Pencil 145 Electric Apparatus-Shocking Machine 139 Electric Apparatus-Thermo Battery, How to Make 59 Electric Apparatus-Thermostat, Small 455 Electric Apparatus-Transformer, 110-Volt 439 Electric Apparatus-Voltammeter, Pocket 330 Electric Battery Massage, Homemade 144 Electric Bed Warmer, Homemade 338 Electric Bell, Relay Made from 94 Electric Blue Light Experiment 47 Electric Clock, Homemade 268 Electric Charges, Detector for 281 Electric Door Opener 78 Electric Engine 276 Electric Experiment, Interesting 377 Electric Experiment, Reversing Switch for 92 Electric Fire Alarm, How to Make 430 Electric Furnace Regulator, How to Make 388 Electric Furnace, Small, How to Make 48 Electric Heat Regulator, Automatic 344 Electric Horn, How to Make 218 Electric Hydrogen Generator 54 Electric Illusion Box 135 Electric Indicator for a Wind Vane 348 Electric Lamp Experiment 53, 120, 131 Electric Lamp Sockets, Miniature, How to Make 270 Electric Lamps, Miniature 434 Electric Lamps, Testing 314 Electric Light Circuit, Experiments with 50 Electric Lighting, Miniature 104 Electric Lights, Turned On and off from Different Places 205 Electric Lock 60, 110 Electric Lock for Sliding Door 89 Electric Lock, Simple 60 Electric Locomotive, Miniature, How to Make 165 Electric Motor 401 Electric Motor, Novel 395 Electric Motor, Small 214, 222, 345 Electric Pendant Switch, How to Make 310 Electric Piano, How to Make 247 Electric Plug, Homemade 430 Electric Postcard Projector 195 Electric Rat Exterminator 358 Electric Shock, To Give While Shaking Hands 133 Electric Shocker for Garbage Cans 94 Electric Stove. Homemade 31, 273 Electric Terminals, Varnish for 376 Electric Time Alarm 433 Electric Toaster, How to Make 37 Electric Walking Stick 413 Electric Wires, Flexible, Adjuster for 386 Electricity, To Discharge Toy Cannon by 59 Electricity; To Explode Powder with 53 Electricity, Writing with 74 Electrodeposition, Copies Made from Wax Molds by 157 Electrolytic Rectifier, How to Make 197 Electromagnet, Floating 152 Electroplating, Easy Method of 88 Electroscope, How to Make 103 Electrostatic Illumination 299 Emery Wheel Arbors, Washers for 359 Enameling a Bicycle Frame 385 Engine, Electric 276 Engine, Gasoline, How to Make 207 Engine, Model Steam 1 Engine, Steam, Made from Gas Pipe and Fittings 184 Engine, Toy Steam, How to Make 73 Engine, Turbine, How to Make 355 Equatorial, Homemade 204, 253 Equilibrator for Model Aeroplanes 11 Experiment, Center of Gravity 302 Experiment, Electric 377 Experiment, Electric Blue Light 47 Experiment, Heat and Expansion 124 Experiment, Phonograph 105 Experiment, Telephone 137 Experiment with a Vacuum 439 Experiment with Colored Electric Lamps 53 Experiment with Heat 134 Experiment with Incandescent Lamp 427 Experiment with Two Foot Rule and Hammer 106 Experiment, X-Ray 190 Experiments, Electric Lamp 120, 131 Experiments, Electrical, Reversing Switch for 92 Experiments with a Mirror 434 Experiments with Electric Light Circuit 50 Eye, Blind Spot in, To Find 129 Eyeglasses, Holding Firm 315

F Fan, Wooden, How to Make 332 Faucet Used as an Emergency Plug 343 Feed Box for Chickens 292 File, Chalking 19 File, Sharpening Skates with 306 File Soft Metals, How to 406 Film Washing Trough 331 Films, Drying 412 Films, Frame for Drying 446 Filter, Simple and Effective 278 Filtering with a Small Funnel 25 Finger Mathematics 181 Finger, Removing Tight Fitting Ring from 361 Fingers, Protecting from Chemicals 283 Fire Alarm, Cheap 47 Fire Alarm, Electric, How to Make 430 Fire Alarm, Simple, How to Make 359 Fire Extinguisher, Homemade 351 Fire, Making with the Aid of Ice 338 Fire Screen, How to Make 82 Fire Screen. Leaded Glass 295 Fish Bait 152 Fish, One Way to Cook 206 Fishhook Box 379 Fishing through Ice, Signals for 10, 281, 380 Flag, Brass, How to Make 266 Flatiron Rest 19 Flier, Toy, How to Make 429 Flint Arrowhead, How to Make 23 Floor Polisher, Homemade 10, 350 Flour Sifter 7 Flower, Magic Growing 244 Flower Pot Stand 33 Flower Pots, Clay, Used for Bird Houses 277 Flower Pots, Window Shelf for 292 Flower Stand, Iron 353 Flowers, Cut, To Longer Preserve 419 Flowers, Decoloration of 288 Flush Valve, Repairing a Washer on 344 Fob, Shoestring Watch, How to Weave 285 Fob, Watch, How to Make 12, 223 Food. Keeping Cool in Camps 21 Football, Tying Knot for 133 Footrest, Child's, on an Ordinary Chair 453 Footwear, Drier for 229 Forks, Balancing on a Pin Head 427 Foundry Work at Home 95 Fountain for an Ordinary Pen 450 Fountain Pen, Ordinary Pen Used as 454 Fountain Pen Used as a Ruler 319 Fountain Pens, Leaking, Remedy for 390 Frame, Brass, in Repousse 237 Frost, To Keep Windows Free from 354 Fuming of Oak 196 Funnel. Eggshell 93 Funnel, Filtering with 25 Funnel, Glass 412 Funnel, Horn Used as 7 Funnel, Temporary 275 Funnel, Venting a 318 Furnace, Brass, How to Build 115 Furnace, Door Opener for 83 Furnace Draft. Alarm Clock to Pull Up 107 Furnace Draft Opener, Automatic 102 Furnace, Electric, How to Make 48 Furnace Regulator, Electric, How to Make 388 Furniture, Cleaning 185 Furniture, Cleaning Leather on 13 Furniture, Drawing of 294 Furniture—Library Set in Pyro-Carving 407 Furniture—Rustic Seat 441 Furnlture—Table, Mission Library, How to Make 141 Furniture, Tightening Cane In 230

G Galvanometer, Tangent, How to Make 150 Galvanoscope, How to Make 68 Game-Baseball, Playing with a Pocket Knife 250 Game-Bottle Pushers 409 Game, Chinese Outdoor 176 Game Played on the Ice 216 Garbage Can, Keeping Animals Away from 94 Gas Cannon 197 Gas Jet, Ringing a Bell by Touching 403 Gas Jet, Shade Holder Bracket for 419 Gas, To Light without Matches 394 Gasoline Burner for Model Work 55 Gasoline Engine, Homemade 207 Gauge, Carpenter's 19 Gauge, Drill 252 Gauge, Rain, How to Make 64 Gauntlets on Gloves 266 Gear Cutting Attachment for Small Lathes 167 Gear for Model Work 225 Gear Wheels, Small, To Make without a Lathe 46 Geissler Tuhe, How to Make 154 Glass Blowing and Forming 420 Glass Cleaning Solution 31 Glass, Effect of Radium on 116 Glass, Emergency Magnifying 305 Glass, Fire Screen, Leaded 295 Glass Funnel, Emergency 412 Glass, Ground, Imitating 294 Glass, Ground, Substitute 255 Glass Letters, Removing from Windows 319 Glass, Magnifying, How to Make 397 Glass, Photograph Prints Mounted on 231 Glass Plates, Piercing with a Spark Coil 426 Glass Tube, To Make a Bulb on 324 Gilder, How to Make 171 Gloves, Cleaner for 302 Gloves, Gauntlets on 266 Gold Leaf, Covering Signals with 189 Gouge Used as a Bit 411 Gramophone Records, Cracked, Repairing 24 Grape Arbor, How to Build 73 Gravity Batteries, Why Fail 115 Gravity Experiment 302 Grease Stains, Removing from Book 230 Grease, To Remove from Machinery 216 Greasing the Front Wheels of an Automobile 320 Grills, Rope, How to Make 277 Ground Glass, Imitating 294 Guitar That Is Easy to Make 320 Gummed Paper, Substitute for 315 Gun Barrels, Bursting of 304 Gun, Toy, for Throwing Cardboard Squares 269 Gymnasium. Outdoor: Part I-The Horizontal Bar 298 Part II-Parallel Bars 301 Part III-The Horse 303

H Hacksaw Blade, Knife Made from 293 Hammock, Barrel Stave 75 Hammock, How to Make 410 Hand Car Made of Pipe and Fittings 440 Hand, Magic Spirit 2 Handbag, Ladies', How to Make 213 Handbag, Removing 36 Cannon Balls from 256 Handkerchlef Mended after Being Cut and Torn 198 Handkerchief Trick, Vanishing 319 Handle, Opengng, for a Stamp Pad 23 Handle, Tying Paper Bag to Make 10 Hanger, Trousers, How to Make 143, 369 Hangers, Tool 453 Hardening Copper 206 Harmonograph, Line 34 Hat. To Hang on a Lead Pencil 133 Hatpins, Sealing Wax, How to Make 175 Hats, Felt, Packing Cut from 207 Heat and Expansion 124 Heat, Cardboard Spiral Turned by 226 Heat, Experiment with 134 Heat Regulator, Electric 344 Hectograph, Homemade 240, 326 Hinge, Broom Holder Made of 33 Hinges, Imitation Fancy Wings on 224 Hinges, Leather, Metal Covering for 41 Hole, Square, How to Bore 179 Hole, Threaded, Sizing 295 Holes, Boring In Cork 8 Holes, Circular. Cutting In Thin Sheet Metal 35 Holes, Different Shaped, Fitting Plug in 122 Horn, Electric, How to Make 218 Horn, Paper Phonograph, How to Make 71 Horn Used as Funnel 7 Horsepower of Small Motors, Finding 238 House, Building In a Tree Top 146 Hydrogen Generator, Constant Pressure 70 Hydrogen Generator, Small Electrical 54 Hygrometer, How to Make 71, 140

I Ice Boat, How to Build 357 Ice Boating 382 Ice, Bottle Pushing on 409 Ice Chisel, Handy 61 Ice, Fish Signal for Fishing through 10 Ice, Fishing through 281 Ice, Game Played on 216 Ice, Making a Fire with the Aid of 338 Ice, Merry-Go-Round Whirl on 380 Ice, Peculiar Properties of 100 Ice, Signals for Fishing through 380 Ice Skates, Hollow Grinding 231 Ice Yacht. How to Build 307 Illusion, Balloon Ascension 300 Illusion Box, Electric 135 Illusion for Window Attraction 239 Illusion. Miniature "Pepper's Ghost" 52 Illusion, Roller Coaster 293 Illusion, Rolling Uphill 361 Illusions, Optical 74, 99, 130, 183, 206, 348, 364 Incandescent Lamp, Experiment with 427 Indian Clubs, Weighting 318 Indicator, Electric, for a Wind Vane 348 Induction Call, How to Make 138 Induction Coil, Lighting an Incandescent Lamp with 112 Induction Call, Small Medical, How to Make 63 Induction Coils, Circuit Breaker for 101 Induction Calls. Mercury Make and Break Connections for 187 Induction Motor, Single Phase, How to Make 124 Ink Bottle Cork, Steel Pen Used in 117 Ink Spots, Removing 131 Inkstand, Ornamental Metal 315 Insulating Aluminum Wire 306 Insulating Cleats, Substitute for 348 Insulation, Removing from Wire 213 Interrupter, How to Make 51 Iodine Stains, Removing 425 Iron Castings, Putty for 269 Iron Flower Stand, Ornamental 353 Iron Polisher 286 Iron Rest for an Ironing Board 288 Iron Work, Ornamental, Easy Designs in 370 Ironing Board Stand, How to Make 17, 429 Irrigating with Tomato Cans 450

J Jelly Making Stand 290 Jewelry, How to Clean 353 Jig Saw Puzzle, Photographic 361 Joint, Dovetail 29 Jump Spark Coil, How to Make 113

K Kennel, Concrete 23 Kennel Door, Automatic Closing 32 Kerosene, Used in Polishing Metals 364 Kettle, Spoon holder On 24 Kettles, Spoon Rest for 304 Key Forms, Preserving 454 Key, Removing from a Double String 179 Kiln, Pottery 62 Kitchen, Novelty Clock for 360 Kitchen Utensil—Baking Pan 13 Kitchen Utensil—Cherry Seeder 29 Kitchen Utensil—Chopping Board 19 Kitchen Utensil—Egg-Beater, How to Make 291 Kitchen Utensil—Elderberry Huller 323 Kitchen Utensil—Flour Sifter 7 Kitchen Utensil for Removing Pies from Pans 275 Kitchen Utensil—Homemade Toaster 139 Kitchen Utensil—Hot Dish Holder 7 Kitchen Utensil—Hot Plate Lifter 318 Kitchen Utensil—Jelly Making Stand 290 Kitchen Utensil—Knife Sharpener 379 Kitchen Utensil—Ladle and Strainer, Combined 302 Kitchen Utensil—Pot Cover Closet 16 Kitchen Utensil—Pot Covers, Homemade 297 Kitchen Utensil—Querl, Versatile 28 Kitchen Utensil—Salad Dressing Mixer 16 Kitchen Utensil—Spoon Rest for Kettles 24, 304 Kitchen Utensil—Tool for Lifting Can Covers 352 Kitchen Utensil—Vegetable Slicer 413 Kite Balancing Strings, Rubber Bands in 270 Kite, Box, How to Make 58 Kite, Chinese, How to Make and Fly 210 Kite Reel. Homemade 156 Kite, Tailless 458 Kites of Many Kinds and How to Make Them 391 Knife Blade, Worn, Repairing 228 Knife Made from Hacksaw Blade 293 Knife, Pocket, Playing Baseball with 250 Knife Sharpener, Kitchen 379 Knot, Magic 198 Knot Trick 167 Knot, Tying for Football 133

L Ladle and Strainer, Combined 302 Ladle, Babbitt 264 Ladle for Melting Babbitt 173 Lamp, Acetylene, Lighting 401 Lamp, Arc 132 Lamp Cord, Flexible, Holder for 317 Lamp Cords, Flexible, Clasp for Holding 267 Lamp, Flash, How to Make 174 Lamp, Homemade Pocket 149 Lamp, Incandescent, Experiment with 427 Lamp, Incandescent, Lighting with an Induction Coil 112 Lamp, Quickly Made 329 Lamp Sockets, Miniature Electric. How to Make 270 Lamp Stand and Shade, How to Make 147 Lamps, Electric, Testing 314 Lamps, Miniature Electric 434 Lamps, To Make Burn Brightly 364 Lantern, Camper's Makeshift 266 Lantern, Darkroom, How to Make 14, 340 Lantern, Homemade 163 Lantern, Magic, How to Make 328 Lantern, Magic, Using Sun's Light in 251 Lantern Slide Masks, Cutting 245 Lantern Slides, Blueprint, How to Make 120 Lantern Slides, How to Make 127, 220 Lantern Slides, Tinted, How to Make 144 Lathe, Bench, Made of Pipe Fittings 316 Lathe, How to Make 86 Lathe, Making Gear Wheels without 46 Lathe, Wood Turning, To Make Out of an Old Sewing Machine 403 Lathe Work, Calipering 258 Lathes, Small, Gear Cutting Attachment for 167 Laundry Device—Clothes Rack 14 Laundry Device—Clothesline, Double, Support for 318 Laundry Device—Iron Rest 19 Laundry Device—Iron Rest for an Ironing Board 288 Laundry Device—Ironing Board Stand 17, 429 Laundry Device—Sad Iron Polisher 286 Laundry Device—Washboard Holder 39 Lavatories, Sleeve Holders for 17 Lead Cannon, How to Make 338 Lead, Melting in Tissue Paper 185 Lead Pencil Rheostat, How to Make 145 Leaf, Photograph Printed on 362 Leather Card case, How to Make 350 Leather Hinges, Metal Coverings for 41 Leather on Furniture, Cleaning 13 Leather, Softening 140 Leather Spectacle Case, How to Make 228 Leather, Table Mat of, How to Make 286 Leather Work, Arts and Crafts 168 Letter Holder of Pierced Metal 294 Lettering on a Dark Ground, Paint for 170 Lettering with a Carpenter's Pencil 306 Letters, Glass, Removing from Windows 319 Levitation-Modern Stage Trick 459 Library Set in Pyro-Carving 407 Life Buoy, How to Make 432 Life preserver, Homemade 4 Light Gas without Matches, To 394 Light, Post or Swinging, Homemade 189 Light Trick, Invisible 251 Lightning Arrester, How to Make 122 Lightning, Photographing 124, 176 Lights, Turning On and Off from any Number of Places 310 Linoleum, How to Repair 273 Liquids-Splashes, Study of 164 Lock, Automatic 106 Lock, Electric 60, 110 Lock, Electric, for a Sliding Door 89 Lock, Homemade Pneumatic 65 Lock, Lubricating 151 Lock, Secret Door 6 Lock, Spring, Protection of 72 Lock, Trunk, How to Attach 134 Lock, Window 397 Locking Several Drawers with One Lock 314 Locomotive, Miniature Electric, How to Make 165 Log, To Cross Stream on 94 Lubricant for Wood Screws 137 Lubricate Sheet Metal, To 69 Lubricating a Lock 151

M Machinery, To Remove Grease from 216 Magazine Binder, To Make 406 Magazine Clamp, How to Make 435 Magazine, How to Bind 40, 56 Magic Box Escape 7 Magic-Electric Illusion Box 135 Magic Lantern, Homemade 328 Magic, Old Time 167, 175, 176, 179, 193, 198, 234, 244, 251, 256, 427 Magic, Parlor, for Winter Evenings 90 Magic Spirit Hand 2 Magic-Violin, Making Spirits Play 295 Magnet for the Work Basket 292 Magnifying Glass, Emergency 305 Magnifying Glass, Homemade 397 Mahogany, Filler for 139 Mail Photographs, How to 312 Mail, Sending Coins by 287 Marble, Rolling 191 Massage, Electric Battery 144 Mat, Wrestling 330 Match, Chain Made from 311 Match Holder of Wood and Metal. How to Make 282 Match, How to Relight 444 Match Safe, Homemade 194 Mathematics, Finger 181 Mattresses, Handling 19 Measuring the Height of a Tree 376 Medical Induction Coil, How to Make 63 Mercury Make and Break Connections for Induction Coils 187 Merry-Go-Round, How to Build 359 Merry-Go-Round Swing. How to Make 131 Merry-Go-Round Thriller 209 Merry-Go-Round Whirl on Ice 380 Metal Coverings for Leather Hinges 41 Metal Inkstand, Ornamental 315 Metal, Melting in the Flame of a Match 449 Metal, Pierced, Letter Holder of 294 Metal, Sheet, Sawing 291 Metal, Sheet, To Lubricate 69 Metal, Thin Sheet, Cutting Circular Holes in 35 Metal Whisk Broom Holder 221 Metals, Soft, How to File 406 Metals, Use of Kerosene In Polishing 364 Mice and Rats, Killing 293 Micrometer, Homemade 130 Microscope, Homemade 433 Microscope, Small, How to Make 408 Microscope without a Lens 76 Minnow Trap, How to Make 390 Mirror, Experiments with 434 Model Aeroplanes. Equilibrator for 11 Model Steam Engine 1 Model, Steamboat 216 Model Work, Gasoline Burner for 55 Model Work, Gear for 225 Model Work, Three Way Cock for 50 Mold, Removing from Wallpaper 320 Monoplane Weather Vane 390 Moon, New, photographing 174 Motor, Battery, Controller and Reverse for 72 Motor, Battery, Reversing 405 Motor, Electric 214, 345, 395. 401 Motor, Reversing 105 Motor, Single Phase Induction 124 Motor, Small, Controller for 42 Motor, Small, How to Make 428 Motor, Water 66, 311 Motorcycle Drives Washing Machine 219 Motors, Small, Finding Horsepower of 238 Mouse Trap 112, 198, 293, 395, 450 Music Cabinet, How to Make 77 Music, Furnace, To Transmit to a Distance 107

N Nail Holes, Filling 85 Nail, To Hang Heavy Things on 323 Nails, Iron Shingle, Life of 244 Necktie Holder, Homemade 369 Negatives. Broken, Restoring 377 Nickel, Polish for 112 Nostril, Child's, Removing Button from 237 Nut Cracking Block 290 Nuts, Tightening 155 Nutshell Photograph Novelty 24

O Oak, Fuming of 196 Optical Illusion 74, 99, 130, 183, 206, 348, 364 Optical Top 69 Ornaments, Christmas Tree, Repairing 11

P Packing, Cut from Felt Hats 207 Paint Brushes, Care of 267 Paint, Cause of Sagging 340 Paint for Lettering on a Dark Ground 170 Paint, Old, Removing 396 Paint, Sealing Up 363 Painting an Automobile 357 Painting Over Putty 136 Painting Yellow Pine 151 Paints, To Prevent from Crawling 55 Paints—Water Color Box 257 Pan, Baking 13 Paper Aeroplane, How to Make 329 Paper Bag, Tying to Make a Handle 10 Paper Bags, Use for 19 Paper Boat, How to Make 321 Paper, Gummed, Substitute for 315 Paper, Smoothing after Erasing 29 Paper, To Remove from Stamps 234 Paper under an Inverted Bottle, Withdrawing 33 Parachutes and Darts, Toy 352 Paraffin Wire, How to 161 Pen, Fountain, Ordinary Pen used as 450, 454 Pen, Fountain, Used as a Ruler 319 Pen, Steel, Used in Ink Bottle Cork 117 Pencil, Carpenter's, Lettering with 306 Pens, Corrosion of, Preventing 257 Pens, Leaking Fountain, Remedy for 390 "Pepper's Ghost" Illusion, Miniature 52 Percolator, Plant Food 258 Perfume Making Outfit 363 Phoneidoscope 407 Phonograph Experiment 105 Phonograph, Homemade 289 Phonograph Horn, Paper, How to Make 71 Phonograph Music, To Transmit to a Distance 107 Phonograph Record Cabinet 79, 433 Phonograph Reproducer, Relieving Weight of 245 Phonograph Spring. Broken, Repairing 316 Phonograph, Steadying 214 Phonograph, Thorns Used as Needles on 453 Photograph Letters, Spelling Names with 232 Photograph Mounts, Rough AIligator 424 Photograph Novelty, Nutshell 24 Photograph of a Clown Face 180 Photograph Postcards, Drying 453 Photograph Print Washing Tank 136 Photograph Printed on a Leaf 362 Photograph Prints, Drying Flat 38 Photograph Prints, Drying Without Curling 425 Photograph Prints, Mounting on Glass 231 Photograph Prints, Stretcher for Drying 275 Photographic Jig-Saw Puzzle 361 Photographing a Man in a Bottle 74 Photographing Lightning 124, 176 Photographing the New Moon 174 Photographing the North Star 443 Photographs, Freak, Making of 110, 440 Photographs, How to Mail 312 Photographs in Relief Easily Made 431 Photographs, Mounting in Plaster Plaques 287 Photographs on Watch Dials, Making 386 Photographs. To Print on Silk 396 Photography—Background Frame, Take Down, How to Make 156 Photography—Changing Bag for Plate Holders 212 Photography—Copying Stand 149 Photography—Darkroom Lantern, How to Make 340 Photography—Darkroom, Small, Building 26 Photography—Developing Box, How to Make 220 Photography—Developing Tray 269 Photography—Developing Tray, Cracked, Repairing 260 Photography—Duplicator for Box Cameras 363 Photography—Enlarging from Life in the Camera 111, 117 Photography—Film Negatives, How to Keep 194 Photography—Film Washing Trough 331 Photography—Films, Drying 412 Photography—Films, Frame for Drying 446 Photography-Green Prints, Paper That Makes 157 Photography-Kits for the Camera 159 Photography-Negative Washer, Adjustable, How to Make 143 Photography-Negatives, Broken, Restoring 377 Photography-Paper Stuck to Negative, To Remove 250 Photography-Pictures, Four, on One Plate 46 Photography-Printing Frame Stand 123 Photography-Prints, Overexposed Developing, Saving 16 Photography-Proofs, Making before Negative Dries 33 Photography-Ray Filter, Substitute for 120 Photography-Toning Blue On Bromide and Platinum 31 Photography-Tripod Holder, Homemade 284 Piano, Electric, How to Make 247 Picture Frame, Etched Copper, How to Make 414 Pies, Removing from Pans 275 Pin Ball, How to Make 314 Pine, Yellow, Painting 151 Pipe and Fittings, Hand Car Made of 440 Pipe and Fittings, Hand Sled Made of 305 Pipe Fittings, Bench Lathe Made of 316 Pipe Fittings, Uses for 61 Pipe, Gas, and Fittings, Steam Engine Made from 184 Pipe Rack, Bent Iron 305 Planing Octagonal Wood Pieces, Block for 293 Plant Food Percolator 258 Plaques, Photo Silhouette Brass 217 Plaques, Plaster, Mounting Photos in 287 Plaster of Paris, How to Mix 110 Plaster, Porous, Removing 41 Plate Lifter, Hot 318 Plug, Electric, How to Make 430 Plug, Emergency, Faucet Used as 343 Plug, Fitting in Different Shaped Holes 122 Plumb-Bob Line, Adjusting 229 Pocket Lamp, Homemade 149 Pockets for Spools of Thread 13 Polish, Aluminum 428 Polish for Nickel 112 Polish, Stove 133, 252 Polisher, Floor 10, 350 Polishing Cloths for Silver 32 Polishing Flat Surfaces 229 Polishing Metals, Use of Kerosene in 364 Porch Swing Chair 128 Portfolio, How to Make 225 Portieres, Japanese, How to Make 265 Postcar Holder, How to Make 363 Postcard Projector, Electric 195 Postcard Rack 25 Postcards, Photograph 453 Postcards, Unreadable, Key Card for Writing 35 Pot Cover, Closet 16 Pot Covers, Homemade 297 Pottery Kiln, Homemade 62 Poultry, Feed Box for 292 Poultry Feeder, Alarm Clock 79 Powder, to Explode with Electricity 53 Propelling Vehicle, How to Make 402 Pulley, Grooved, Made from Sheet Tin 412 Pump, Rotary, How to Make 81 Punch. Piercing, for Brass 19 Punching Bag Platform, Adjustable 267 Punt, Homemade 123 Purse, Coin, How to Make 354 Putty, Blacking 376 Putty for Iron Castings 269 Putty Grinder 191 Putty, Painting over 136 Putty, To Preserve 121 Puzzle, Checker Board 189, 233 Puzzle, Dovetail Joint 236 Puzzle, Photographic Jig Saw 361 Puzzle, Wire 378 Pyro-Carving, Library Set in 407

Q Quartz Electrodes Used in Receiving Wireless Messages 170 Querl, Versatile 28 Quilting Frames, Folding 258

R Rabbit Trap, Homemade 233 Rabbit Trap, Self Setting, How to Make 158 Rabbits, Trap for 395 Rack, Bent Iron Pipe 305 Rack, Clothes 14 Rack, Cup and Saucer 105 Rack for Displaying Coins 220 Rack, Postcard 25 Rack, Shoe 146 Radium Affects Glass 116 Rain Gauge, How to Make 64 Rat Exterminator, Electric 358 Rat Traps 290, 395 Rats and Mice, Killing 293 Rats, Keeping from a Chicken Coop 352 Ray Filter, Substitute for 120 Reel, Kite 156 Relay Made from an Electric Bell 94 Rheostat, Battery 80, 445 Rheostat, Lead Pencil, How to Make 145 Rheostat, Water 78 Rheostat, Water, How to Make 43 Ring, Finger, How to Make 39 Ring, Tight Fitting, Removing from Finger 361 Roller Coaster Illusion 293 Roller Skates, Homemade 386 Rope Grills, How to Make 277 Rubber Bands in Kite Balancing Strings 270 Rubber Stamps, How to Make 393 Rubber Tip for Chair Legs 229 Rule and Hammer, Experiment with 106 Ruler, Fountain Pen Used as 319

S Sack Trick 251 Sail, To Attach to a Bicycle 425 Sailomobile, How to Make 326, 415 Sails, Boat, Revolving a Wheel with 152 Sails for Skaters 381 Salad Dressing, Aid in Mixing 16 Sandpaper, To Keep from Slipping 376 Saw, Bracket, How to Make 42 Saw, Homemade Scroll 11 Sawing Sheet Metal 389 Scissors, Removing from a Card 175 Scissors, Sharpening 419 Sconce, How to Make 325 Scoop, Shot 230 Screen, Fire, How to Make 82 Screw, Tightening with Lead 233 Screws, Inserting in Hardwood 318 Screws, Wood, Lubricant for 137 Sealing Wax Bent While Cold 61 Sealing Wax Hatpins, How to Make 175 Seals, Clear Wax Impressions from 450 Searchlight, Self Lighting Arc 9 Searchlight, Small, How to Make 336 Seat, Rustic 441 Settee, Homemade 385 Sewing Bag, How to Make 386 Sewing Machine, Old Wood Turning Lathe Made Out of 403 Screw, To Hold on a Screwdriver 337 Scroll Saw, Homemade 11 Shade, Candle, How to Make 191 Shade, Fastening to a Roller 413 Shade Holder Bracket for a Gas Jet 419 Shaving Mug, Traveler's 9 Shelf Arrangement, Convenient 413 Shelf, Mission Bracket 39 Shelf, Turn Down, for a Small Space 144 Shelf, Window, for Flower Pots 292 Shellac Gum, Dissolving 124 Shocking Machine, Homemade 139 Shoe Horn, Substitute 25 Shoe Rack, Homemade 146 Shoe Scraper 413 Shoes, Skating, How to Make 158 Shoes, White, Cleaner for 239 Shoestring Watch Fob, How to Weave 285 Shot Scoop 230 Shower Bath, Homemade 15 Signals, Covering with Gold Leaf 189 Signals for Fishing Through Ice 10, 380 Silhouette Brass Plaques, Making 217 Silhouettes, How to Make 68 Silk, To Print Photographs on 396 Silver, Cleaning 305, 344 Silver Plating Outfit, Small, To Make 360 Silver, Polishing Cloths for 32 Sink or Bathtub Stopper, Substitute 429 Sizing a Threaded Hole 295 Skate Sharpener, Pocket, How to Make 166 Skater, Winged 381 Skates, Ice, Hollow Grinding 231 Skates, Roller, How to Make 386 Skates, Sharpening with a File 306 Skating Shoes, How to Make 158 Ski, Norwegian 384 Skidoo-Skidee Trick, Scientific Explanation of 162 Skis and Ski-Toboggans, Making 3 Sled, Barrel Stave 383 Sled, Bicycle 157 Sled, Bicycle Coasting, How to Make 231 Sled, Hand, Made of Pipe and Fittings 305 Sled, Toboggan, How to Make 44, 384 Sled, Yankee 408 Sleds, Coaster, Rocker Blocks on 223 Sleeve Bands, Bicycle Trouser Guards as 283 Sleeve Holders for Lavatories 17 Sleigh, Chair 383 Sleigh, Running 381 Sling, Crossbow and Arrow, How to Make 339 Snow House, Eskimo, How to Make 5 Snowshoes, Homemade 9 Solder with Low Melting Point 421 Soldering Clamps, Homemade 137 Soldering for the Amateur 38 Soldering Tool, Emergency 28 Spark Coil, Piercing Glass Plates with 426 Spectacle Case, Leather, How to Make 228 Spit Turned by Water Power 102 Splashes, Study of 164 Spine for Draftsman 406 Spoon Rest for Kettles 24, 304 Sport-Skis and Ski-Toboggans, Making 3 Sports, Winter, Devices of 380 Spring Board for Swimmers 237 Spring, Curtain Roller, How to Tighten 79 Sprocket Wheels, Small, To Make 15 Stage, Miniature, How to Make 159 Stains, Iodine, Removing 425 Stains on Book Leaves, Removing 31 Stamp Pad, Handle for Opening 23 Stamps, To Remove Paper from 234 Star, North, Photographing 443 Static Machine, How to Make 177 Steam Calliope, How to Make 418 Steam Engine Made from Gas Pipe and Fittings 184 Steam Engine, Model 1 Steam Engine, Toy, How to Make 73 Steam Turbine, Homemade 20 Steamboat Model, Simple 216 Steel, Chisel, Annealing 362 Steering Wheel, Heated 441 Stereograph, Principles of 186 Stick Pin, How to Make 164 Still, Homemade 426 Still, Simple, How to Make 170 Stool, Camp, How to Make 222 Storage Battery, Small, How to Make 121 Stove, Electric, How to Make 31, 273 Stove Polish 133, 252 Stovepipe, Cleaner for 230 Stoves, Cleaning 155 Strainer and Ladle, Combined 302 Stream, Crossing on a Log 94 Street Car Line, Imitation, How to Build 374 Sundial, How to Lay Out 261 Sunlight, Using in Magic Lantern 251 Swimmers, Spring Board for 237 Swimming Pool, Concrete 178 Swing and Turning Rings Combined 283 Swing Chair, Porch 128 Swing, Homemade Round 192 Swing, Merry-Go-Round, How to Make 131 Swing Seat, Child's Homemade 276 Switch, Automatic Time 80 Switch, Battery 99 Switch, Electric Pendant, How to Make 310 Switch, Reversing for Electrical Experiments 92 Switch, Simple, for Reversing a Current 111

T Table, Lifting 99 Table Mat of Leather, How to Make 286 Table, Mission Library, How to Make 141 Table Pads, Asbestos 212 Talking Machine Reproducer, Relieving Weight of 245 Tank, Small, Aerating Water in 241 Target, Illuminated 291 Tarnish, Removing 17 Tea Tray, Cheesebox Cover 18 Teeter Board, Revolving 297 Telegraph and Telephone Line, Combination 332 Telegraph Codes 422 Telegraph Instrument and Buzzer, How to Make 334 Telegraph Key and Sounder, How to Make 76 Telegraph Key, Homemade 21, 283 Telegraph Line, One Wire 78 Telegraph, Line, Simple Open Circuit 59 Telephone and Telegraph Line, Combination 332 Telephone Experiment 137 Telephone Receiver, Homemade 55, 353 Telephone, Receiving Wireless Telegraph Messages with 92 Telephone, Singing 75 Telephone Transmitter, Homemade 398 Telephone, Wireless, How to Make 432 Telescope, How to Make 108 Telescope Stand and Holder 218 Telescope, Water, How to Make 410 Tent, Bell, How to Make 190 Tent, Lawn, Quickly Made 398 Tents, Weatherproofing for 389 Thermo Battery, How to Make 59 Thermo-Electric Battery, How to Make 140 Thermometer, Air 152 Thermometer Back in Etched Copper. To Make 246 Thermostat. Small, How to Construct 455 Thorns Used as Needles In a Phonograph 453 Thread, Cutting Inside Glass Bottle 179 Thread Spools, Pockets for 13 Time Alarm, Electric 433 Time Switch, Automatic 80 Tin, Sheet, Grooved Pulley Made from 412 Tinware, Rustproof 347 Tire Repair, Emergency 33 Toaster, Electric, How to Make 37 Toaster, Homemade 139 Toboggan Sled, How to Make 44, 384 Toboggans and Skis, Making 3 Tool, Cutting Point of 278 Tool for Lifting Can Covers 352 Tool Hangers 453 Tool, Soldering 28 Top, Austrian 12 Top, Optical 69 Toy, Child's Rolling, How to Make 224 Toy Darts and Parachutes 352 Toy Flier, How to Make 429 Toy-Skidoo-Skidee, Scientific Explanation of 162 Trailer for a Bicycle 397 Transformer, 110-Volt. How to Make 439 Trap for Rabbits, Rats and Mice, How to Make 395 Trap for Small Animals 82 Trap, Minnow, How to Make 390 Trap, Mouse 112, 198, 450 Trap, Rabbit 233 Trap, Rat 290 Trap, Self Setting, How to Make 158 Trays, Copper. How to Make 180 Tree, Measuring the Height of 376 Tree Top, Building House in 146 Trees, Burning Inscriptions on 45 Trick, Balancing on Chairs 131 Trick, Bottle, Diving 331 Trick, Buttonhole 234 Trick, Cannon Balls, 36, Removing from Handbag 256 Trick, Card. with Tapered Deck 70 Trick, Coin and Card on the First Finger 175 Trick, Coin and Tumbler 378 Trick—Coin, Changing into a Button 234 Trick—Coin, Disappearing 176, 193 Trick—Coin, Moving Under a Glass 214 Trick—Coin, Sticking against Wall 176 Trick—Coins, Dropping in a Glass Full of Water 231 Trick—Coins, Making Stick to Wood 287 Trick—Cord, Buttoned 427 Trick—Electric Illusion Box 135 Trick—Electric Shock, To Give While Shaking Hands 133 Trick—Flowers, Growing 244 Trick—Forks. Balancing on a Pin Head 427 Trick—Handkerchief Mended after Being Cut and Torn 198 Trick—Hat, To Hang on a Lead Pencil 133 Trick—Key, Removing from a Double String 179 Trick, Knot 167 Trick—Knot. Magic 198 Trick—Light, Invisible 251 Trick—Magic Box Escape 7 Trick—Magic Spirit Hand 2 Trick—Marble, Rolling 197 Trick, Mechanical, with Cards 63 Trick—Miniature "Pepper's Ghost" Illusion 52 Trick—Optical Illusions 74 Trick-Paper, Withdrawing from Under an Inverted Bottle 33 Trick-Photograph of a Clown Face 180 Trick, Rising Card 256 Trick, Sack 251 Trick—Scissors. Removing from Card 175 Trick, Skldoo-Skldee 116 Trick, Stage-Levitation 459 Trick-Table, Lifting 99 Trick-Thread, Cutting Inside a Glass Bottle 179 Trick, Vanishing Handkerchief 319 Trick-Violin, Making Spirits Play 295 Trick, Watch 313 Trick, Water and Wine 244 Trick with a Coin in a Wine Glass 167 Tripod Holder, Homemade 284 Trolley Coaster, Homemade Overhead 387 Trousers, Hanger for 143, 369 Trunk Lock. Combination, How to Attach 134 Turbine Engine, How to Make 355 Turbine, Steam 20 Turning Rings and Swing, Combined 283 Turpentine In Cutting Oil 302 Typewriter Ribbons, Renewing 454

V Vacuum Cleaner, New Use for 25 Vacuum, Experiment with 439 Valve, Flush, Repairing a Washer on 344 Varnish for Electric Terminals 375 Vegetables, Preventing Burning in a Pot 14 Vegetable Slicer 413 Vehicle-Automobile, Boy's Homemade 430 Vehicle-Hand Car Made of Pipe and Fittings 440 Vehicle, Propelling, How to Make 402 Vehicle-Wind Propeller, How to Make 415 Violin, Making Spirits Play 295 Vise, Carpenter's Homemade 36 Vise. Hand. How to Make 201, 211, 226, 280, 340 Volcano. Miniature. How to Make 448 Voltammeter, Pocket 330 Voltmeter, Battery 153 Vulcanizing Press for Rubber Stamps 394

W Walking Stick. Electric 413 Wall, Cleaning 375 Wall, Waterproofing 229 Wallpaper, Moldy, Cleaning 320 War Dance, Miniature 255 Washboard Holder 39 Washer on a Flush Valve, Repairing 344 Washers for Emery Wheel Arbors 359 Washing Machine, Driving with Motorcycle Power 219 Watch, Demagnetizing 166 Watch Dial. Illuminating at Night 149 Watch Dials, Making Photographs on 386 Watch Fob, How to Make 12, 223 Watch Fob, Shoestring, How to Weave 285 Watch Trick, Mystifying 313 Water, Aerating In Small Tank 241 Water and Wine Trick 244 Water Bicycle, How to Make 335 Water Candlestick 406 Water Colors, To Prevent from Crawling 54 Water, Drowning a Dog's Bark with 435 Water. Freezing in Pipes 409 Water Motor, Homemade 66, 311 Water Power, Spit Turned by 102 Waterproofing a Wall 229 Water Rheostat 43, 78 Water Supply, Cost of 435 Water Telescope. How to Make 410 Water Wheel Does Family Washing 129 Water Wheel, How to Make 374 Water Wings, How to Make 202 Wax Impressions from Seals 450 Wax Molds, Copies Made by Electrodeposltion 157 Weather Vane, Monoplane 390 Weatherproofing for Tents 389 Weights for Athletes, How to Make 274 Wheel, Revolving with Boat Sails 152 Wheels, Front, of an Automobile, Greasing 320 Wheels, Sprocket, To Make 15 Whisk Broom Holder, Sheet Metal 221 Wind Propeller, How to Make 415 Wind Vane, Electric Indicator for 348 Windmill for Practical Purposes, How to Make 399 Windmill, Miniature, How to Make 333 Windmill, Musical 74 Windmill, Stationary, How to Make 445 Window Attraction—Fish and Birds Illusion 239 Window Boxes, Rustic 30 Window Conservatory 103 Window Display 22 Window Lock 397 Window Shade, Fastening to a Roller 413 Window Shade, Repair for 229 Window Shelf for Flower Pots 292 Window Stick 450 Windows, Removing Glass Letters from 319 Windows, To Keep Free from Frost 354 Wings, Water, How to Make 202 Winter Sports, Devices of 380 Wire, Aluminum, Insulating 306 Wire Connections, Flexible, Forming Coils to Make 443 Wire Loop Connections for Battery Binding Posts 449 Wire, Paraffin, How to 161 Wire Puzzle 378 Wire, Removing Insulation from 213 Wire Terminals for Battery Connections 168 Wireless Coherer, Easily Made 77 Wireless Messages, Quartz Electrodes Used In Receiving 170 Wireless Systems, Simple 54 Wireless Telegraph, How to Make 84, 121 Wireless Telegraph Messages, To Receive with a Telephone 92 Wireless Telegraph, Short Distance 102 Wireless Telephone, How to Make 432 Wires, Drawing Into Fixtures 13 Wires, Flexible Electric, Adjuster for 386 Wondergraph, How to Make 436 Wood Pieces, Octagonal Wood, Block for 293 Wood, Staining 221 Woodwork, Cleaning 315 Work Basket, Homemade 22 Work Basket, Magnet for 292 Workbench for the Amateur 226 Workbench, Homemade 442 Wrestling Mat 330 Writing with Electricity 74

X X-Ray Experiment 190 X-Ray Instrument, Homemade 151

Y Yacht, Ice, How to Build 307

Z Zincs, Old Battery, To Use 87

THE END