* * * * *

PORTABLE STEAM ENGINES, combining the maximum of efficiency, durability and economy, with the minimum of weight and price. They are widely and favorably known, more than 750 being in use. All warranted satisfactory or no sale. Descriptive circulars sent on application. Address

J C HOADLEY & CO Lawrence, Mass

* * * * *

BLIND-SLAT TENON MACHINE.—We have recently patented one of the above Machines, which we GUARANTEE SUPERIOR to any machine of the kind in use. Shall be pleased to furnish cuts and prices of this and any other Wood-working Machinery. Address STEPTOE, McFABLAN & CO., Cincinnati, Ohio.

* * * * *

FOR CUTS AND PRICES of Machinists' Tools, address STEPTOE, McFARLAN & CO.,

Cincinnati, Ohio,

* * * * *

STEAM AND WATER GAGES, STEAM Whistles, Gage Cocks, and Engineers' Supplies. 16 tf

JOHN ASHCROFT, 50 John St., New York.

* * * * *

H. BOARDMAN, Lancaster, Pa.—Superior Patent Cork-cutting Machinery, Hard-laid Twine Cord, and Rope Machinery, with Pat. Stop & Condenser

* * * * *

WOODWORTH PLANERS a SPECIALTY—From new patterns of the most approved style and workmanship. Wood-working Machinery generally. Nos. 24 and 26 Central, corner Union street, Worcester, Mass. Warerooms. 42 Cortlandt street, New York.

WITHERBY, RUGG & RICHARDSON.

* * * * *

SILICATE OF SODA, IN ITS VARIOUS forms, manufactured as a specialty, by Philadelphia Quartz Co., 783 South 2d St., Philadelpnia, Pa.

* * * * *

11-2 by 2 FEET IS THE superb new plate "Evangeline," given free to all who send 75 cents for the "STAR SPANGLED BANNER," for 1870.

* * * * *

Pevey's Cupola,

WARRANTED to Melt, with, one tun of Coal, 2000 lbs. of Iron MORE than any other Cupola now in use.

ABIEL PEVEY,

Patentee and Proprietor, Lowell, Mass. Van Tuyl & Co. No. 273 Cherry st,. New York, Agents.

* * * * *

MERRICK & SONS

Southwark Foundery,

430 Washington Ave., Philadelphia, Pa.,

MANUFACTURE NASMYTH & DAVY

STEAM HAMMERS, CORNISH PUMPING, BLAST, HORIZONTAL, VERTICAL, AND OSCILLATING ENGINES.

Gas Machinery of all descriptions.

Sugar Refineries fitted up complete, with all modern apparatus.

New York office

62 Broadway.

* * * * *

LECOUNT'S PATENT HOLLOW LATHE DOGS AND CLAMPS.—A set of 8 Dogs from 3/8 to 2-in., inclusive, $8. A set of 12 from 3/8 to 4-in., $17.30. Five sizes Machinists' Clamps, from 2 to 6-in., inclusive, $11. Send for Circular.

C.W. LECOUNT.

South Norwalk,

Conn.



* * * * *

MASON'S PAT'T FRICTION CLUTCHES are Manufactured by Volney W. Mason & Co., Providence, R.I. Agents, R. BROOKS & CO., 123 Ave. D, New York. TAPLIN RICE & CO. Akron, Ohio 16 tfeow

* * * * *

Molding Machinery.

THE MOST VALUABLE MACHINE FOR Planing Irregular and Straight Work in all branches of Wood-Working, is the Combination Molding and Planing Machine Co.'s "Variety Molding and Planing Machine." Our improved guards make it safe to operate; our combination collars save one hundred per cent; and for planing, molding, and cutting irregular forms, our Machine is unsurpassed. The right to make and vend these Machines is owned solely by us, and we will defend Purchasers in case litigation is forced upon them by any parties pretending to own Patent on any part of our Variety Machine. COMBINATION MOLDING AND PLANING MACHINE CO., 424 East 23d st., or Postoffice Box 3230 New York City. Silas M. Hamilton, Baltimore Samuel Leggert, New York. 19 tfeow

* * * * *

Gear's Variety Moulding Machine,

WARRANTED THE BEST in THE WORLD FOR Moulding and Cutting Irregular Forms, with Patent Improvements for Combination Cutters, and Patent Guard to protect operator and material. Secured by six Patents. Deeds of Right to use furnished with every Machine sold, to protect parties in using them. Before purchasing Combination Moulding and Planing Machine Co.'s or Grosvenor's Mongrel Infringing Machines, (which they and their agents, in behalf of the Singer Sewing Machine Co., and the Central Pacific R.R. Co., and others to whom they had sold Machines to be used out of the State of New York, have been made to pay us for using) or Ball's or Fay's infringing Machines, which users have had to pay us for right to use. Address for particulars and Machines, Sole Owners and Lawful Manufacturers for all the United States, except New York

A.S.& J. GEAR & CO.,

NEW HAVEN, CONN., or 91 Liberty Street, New York.

* * * * *

MACHINERY.—S.C. HILLS, No.12 Platt st., New York, dealer in all kinds of Machinery and Machinists' supplies. 2 tf a

* * * * *

PLATINUM. H.M. RAYNOR 57 Bond st., N.Y.

* * * * *

AGENTS wanted everywhere. Brown's Pat. Double Cone Ventilating Damper gives the most heat with the least fuel. Send tor Circulars.

O.R. BRIGGS & CO., 184 Washington st., N.Y

* * * * *

AMERICAN TINNED SHEET IRON.

Coating uniformly over the entire sheet, by an entirely new and patented process. All sizes and gages on hand and made to order.

H. W. BUTTERWORTH & SON,

29 and 31 Haydock st., Philadelphia, Pa.

25 eow tt

* * * * *

Independent Steam

BOILER SUPPLY, OR Feed Pump.

RELIABLE FOR HOT OR COLD WATER.



Circulars sent free.

COPE & CO.,

No. 118 East 2d st., Cincinnati, Ohio

* * * * *

BREECH-LOADING GUN.—

Probably superior to any in the market. Patent for sale. Address

T.L.,

Box 728 Postoffice, Derby, Conn,

* * * * *

CIRCULAR SAW MILLS, PLANERS Matchers, etc. Prices Low. S. HEALD & SONS Barre, Mass., make the Largest and Best Planer to be found for the money. Send for circulars.

* * * * *

SHINGLE AND HEADING MACHINE—Trevor & Co.'s Improved. The Simplest and Best in use. Also, Shingle, Heading, and Stave Jointers, Stave Cutters, Equalizers. Heading Turners, Planers, etc. Address TREVOR & CO, Lockport, N. Y.

* * * * *

THE INVENTOR'S AND MECHANIC'S GUIDE.—A valuable book upon Mechanics, Patents, and New Inventions. Containing the U. S. Patent Laws, Rules and Directions for doing business at the Patent Office; 112 diagrams of the best mechanical movements, with descriptions; the Condensing Steam Engine, with engraving and description; How to Invent; How to Obtain Patents; Hints upon the Value of Patents; How to sell Patents; Forms for Assignments; Information upon the Rights of Inventors, Assignees and Joint Owners; Instructions as to Interferences, Reissues, Extensions Caveats, together with a great variety of useful information in regard to patents, new inventions, and scientific subjects, with scientific tables, and many illustrations 108 pages. This is a most valuable work. Price only 25 cents. Address MUNN & CO., 37 Park Row, N.Y.

* * * * *

BALL, BLACK & CO.

Nos. 565 and 567 BROADWAY,

Offer an Unequaled Assortment of

JURGENSEN, NARDINE, JACOT, SALTZMAH, NICOUD, GERARD, FRODSHAM, PEARDON, GORDING, RUGENSTEIN, HARRISON, TAYLOR.

ALSO, A FULL LINE OF AMERICAN WATCHES,

At the Lowest Price.

* * * * *

ROPER Carloric Engine Co., 49 Cortlandt st. New Style Upright Engines. Send for Circular.

* * * * *

Perpetual Brick Kiln.

SAVES 2-3 IN FUEL. Address WEDEKIND & DUEBERG, 55 N. Calvert st., Baltimore, Md.

* * * * *

WANTED-To correspond with an extensive manufacturing firm of 1st-class reliability, to make and sell, on royalty, Dodge's 2-way cock or pump attachment. Exclusive control of territory given. 100,000 doz wanted in U.S. Address Hedden & Dodge, Lowville, N.Y.

* * * * *

WANTED.—

In an Extensive Agricultural Implement Works in Ohio, an Experienced and Capable Superintendent. None but a Through Machinist, who can give high reference as to Character, etc., need apply. Address

Thrashing Machine Works, Drawer 5947, Chicago, Ill.

* * * * *

RIGGS' BELMONTYLE OIL

PREVENTS

Rust, Tarnish, etc. Send for circular to

H.B. Riggs,

150 Front Street, Hew York.

* * * * *

The Mother's Journal.

THE BEST HOME MAGAZINE IN THE WORLD.

Beautifully illustrated; 600 double-column pages; $2 per year. Specimens sent free. Now is the time. Address

MOTHERS' JOURNAL, Chicago, 111.

* * * * *

DECISION ON STEAM ENGINES.—Wm. A. HARRIS, builder of the Corliss Steam Engine, was awarded the 1st Premium at the National Fair of the American Institute, New York,1869, for its superiority in economy in fuel, regularity in speed, perfect construction, accessibility of all its parts. Send for a circular. One 80-H.P. Engine, ready for delivery; one 40-H.P. Engine, ready for delivery; three 30-H.P. Engines, ready for delivery. WM. A. HARRIS Providence R.I. New York Office 49 Murray st. Send for a circular.

* * * * *

Manufacturers' Depot.

SPOKES, HUBS, WHEELS,

And a general assortment of Carriage and Wagon Wood work. The above goods are of our own manufacture, which enables us to offer better inducements than any other House in the city.

N.G. OLDS & SON,

51 Murray st., New York.

* * * * *

ROOT'S WROUGHT IRON SECTIONAL

Safety Boiler.

Composed of best Wrought Iron Tubes, tested to 500 pounds; no large sheet iron, shell or thin cast iron to explode. Absolutely safe, economical, durable, and efficient. Send for pamphlet. Also, Steam Engines, Steam Pumps, etc.

ROOT STEAM ENGINE CO.,

95 and 97 Liberty St., New York.

* * * * *

FOR SALE—A 60-H.P. Root's Sectional Safety Boiler, at Atlantic Sugar Refinery. Brooklyn. Apply to LABATT & CO., 111 Front st., New York.

* * * * *

POWER PLEDGED

Equal to any overshot, with

N.F. BURNHAM'S

New Turbine

Water Wheel.

Illustrated Pamphlet, for 1870, "with Reduced Price List," sent free by N.F. BURNHAM, "Patentee," York, Pa., or S.N. Hartwell, "Ag't," 98 Liberty st., N.Y.



* * * * *

The Woven Wire Mattress Co.

OF

HARTFORD, CONN.,

Call attention to the fact, that they have established AN AGENCY in the City of NEW YORK, at 82 E. Ninth St., opposite the store of A. T. Stewart & Co., for the sale of the

Woven Wire Mattress.

All who are interested in the article in this No. of the Scientific American, all who admired its qualities at the American Institute Fair, and all who desire A PERFECT BED, are requested to call at the Agency and examine it. The Mattresses are for sale by many of the Furniture Dealers in the city, and also throughout New England. If your furniture dealer does NOT keep them, order one through him, at the Agency in New York, or directly from the Co. Send for circulars, rights, or any information desired, to GEO. C. PERKINS, Sup't, Hartford, Ct.

* * * * *

STEREOSCOPES

WITH ENDLESS CHAIN—To hold from 3 to 50 doz. pictures, in great variety, at the Patentee's manufactory. ALX BECKER, 560 Broadway, N.Y.

* * * * *

TO INVENTORS AND MANUFACTURERS IN THE UNITED STATES—

Mr. George Wood, Wood's Museum and Menagerie, respectfully and earnestly invites the attention of Inventors and Manufacturers to the fact that, at a large expense, he has arranged a hall in the Museum Building, for the purpose of exhibiting to the public Models, Machines, and all the products of inventive genius in active working operation. The space allotted for this purpose embraces 6,000 square feet, supplied with Steam-power, Gas, and all the requirements of the Workshop, the Factory, and the Laboratory, which will be kept open every day and evening, and form a perpetual MECHANICS' FAIR, affording an opportunity to Inventors and Mechanics to place their products before thousands of daily visitors at a nominal tariff. Inventors and Mechanics are earnestly invited to co-operate in this laudable and advantageous enterprise, and are requested to call on or address MR. WALTER P. NEWHALL, Superintendent of Machinery and Models. GEO. WOOD, Proprietor. Office at Wood's Museum, corner Broadway and 30th st.

* * * * *

FRENCH BAND SAW MACHINES, SAWS, Taper Files, etc., Machines for Scroll, Re-sawing, and Log; Mongin & Co.'s Band Saw Blades, all Sizes, on hand and made to order.

All Styles of Band Saw Machines in operation at Mahogany Mill, 10th st., E.R.

GEORGE GUEUTAL,

Sole Agent for the U.S., 39 West 4th st., N.Y.

* * * * *

Horsford's Bread Preparation.

The only "baking powder" recommended by Scientific Men. Made under personal supervision of Prof. Horsford, of Harvard University. Restores to fine flour the Phosphates. Refer to S.H. Wales, Scientific American; Dr. Fordyce Barker; Dr. John H. Griscom; Dr. Wm.A. Hammorid (late Surgeon Gen. U.S. Army), Prof. R.O. Doremus, all of New York; Prof. J.C. Booth, Prof. S.H. Dickson, Philadelphia, etc. Liebig & Horsiord's Essay on Bread Making sent free.

WILSON, LOCKWOOD, EVERETT & CO.,

201 Fulton st., New York, General Agents.

* * * * *

STURDEVANT'S FAN BLOWERS,

Pressure Blowers,

THE BEST FOR ALL PURPOSES.

Judson's Governors.

THE ONLY RELIABLE.

JAS.L. HAVEN & CO., Cincinnati, Ohio,

Agents for the above standard, articles.

* * * * *

Oak Leather Belting.

Manufactured Dy CHAS. A. SCHIEREN, 92 Gold st., N.Y.

* * * * *

SCHLENKER'S PATENT

BOLT CUTTER

NEW INVENTION.

ADDRESS.

HOWARD IRON WORKS. BUFFALO. N.Y.

* * * * *



Reynolds'

Turbine Water Wheels.

No Complex, Duplex, or Triplex complications. All such are costly, perishable, easily clogged, inaccessible. Mill Gearing, Shafting, and Pulleys. Send for Illustrated Pamphlet.

GEORGE TALLCOT,

96 Liberty st., New York.

* * * * *

STEAM ENGINES & BOILERS

From 4 to 500-H.P., including celebrated Corliss Patent Variable Cut-off Engines, Slide Valve Stationary Engines, Portable Engines, etc. Also, Circular Mulay, & Gang Saw Mills Sugar Cane Mills, Shafting, Pulleys, etc. Wheat and Corn Mills, Circular Saws, Belting, etc. Send for Circular and Price List.

WOOD & MANN

STEAM ENGINE CO.,

Utica, N.Y.

* * * * *

IRON PLANERS, ENGINE LATHES, Drills, and other Machinists' Tools, of Superior Quality, on hand and finishing. For sale Low. For Description and Price, address NEW HAVEN MANUFACTURING CO., New Haven, Conn. 5 tf os

* * * * *

Free.—Our New Catalogue of Improved STENCIL DIES. More than $200 A MONTH is being made with them S.M. SPENCER & CO., Brattleboro Vt.

* * * * *



Factory, Trenton, N.J.... Office. No. 2 Jacob st., N.Y.

Branch Office for Pacific Coast, No. 606 Front st. San Francisco, Cal.

* * * * *

HOWLAND'S PAT. KNIFE SHARPENER.



The best and most durable thing of the kind ever invented. Agents wanted from all parts of the country. Sure sale. Every family wants one. Sample of Porcelain sent on receipt of 75c.

F. TRAVER & CO.,

Agents,

14 Park Place,

New York.

* * * * *

Pratt's "Astral" Oil.

UNLIKE MANY OTHER ILLUMINATING OILS, the Astral Oil is perfectly pure and free from all adulterations of any kind. It emits no offensive smell while burning, gives a soft and brillant light, and can be used with as little danger as gas. Chemists pronounce it the best and safest Illuminating Oil ever offered to the public; and insurance companies indorse and urge upon consumers the use of the "Astral" Oil in preference to any other. Thousands are now burning it, and in no instance has any accident occurred from its use. A lamp filled with it upset and broken will not explode or take fire. To prevent adulteration, the Astral Oil is packed only in the Guaranty Patent Cans, of 1 gallon and 5 gallons each, and each can is sealed in a manner that cannot be counterfeited Every package, with uncut seal, we warrant. The universal testimony of consumers is that the "Astral" Oil is perfect; a single trial serves to establish it in the family.

For sale by all dealers, and by wholesale and retail by the proprietors

Oil House of CHARLES PRATT.

P.O. Box, 3,050.

108 Fulton Street, New York.

Send for Circulars with testimonials and price list.

* * * * *

Building Paper.

This is a hard, compact paper, like an ordinary book cover, and is saturated with tar and used on the outside of frame buildings, under the clapboards, also under shingles and floors, to keep out damp and cold. It is also used on the inside, not saturated, instead of Plastering, and makes a warm and cheap wall. It costs only from $8 to $30 (according to size) to cover houses on the outside. Samples and descriptive circulars sent free.

Address, ROCK RIVER PAPER CO., Chicago,

Or B.E. HALE, 22 & 24 Frankfort Street, N.Y.,

Agent for the Eastern States.

* * * * *

CAUTION TO

BRASS COOK

MAKERS.

PLUMBERS, STEAM AND GAS FITTERS,

ARCHITECTS, BUILDERS, DEALERS IN BRASS GOODS,

And ALL OTHERS against MAKING, BUYING, SELLING, or USING any INFRINGEMENT of our "PATENT RIGHT" for COMPRESSION BIBBS, FAUCET, COCKS, or on any thing to which our Patent is applied.

We have already commenced LEGAL proceedings with the firm determination to prosecute all and every violation of our rights to the fullest extent of the law.

MESSRS. HAYDEN, GERE, & CO.,

84 Beekman st.

NEW YORK,

—AND—

DALTON & INGERSOLL, 19 Union st.

BOSTON,

Are our ONLY Authorized Selling Agents.

_E. STEBBINS

Manufacturing Co._,

SPRINGFIELD, MASS.

* * * * *

Ahearn's Patents.

PURCHASERS wanted for every State and County not yet sold. $1000 AND EXPENSES can be made monthly on every $200 invested. For particulars, address

J. AHEARN,

5 P.O. Avenue, Baltimore, Md.

* * * * *

PATTERN LETTERS

TO PUT ON PATTERNS FOR CASTINGS—.&.C.

KNIGHT BROS.

SENECA FALLS N.Y.

* * * * *

$20 A DAY TO MALE AND FEMALE Agents to introduce the BUCKEYE $20 SHUTTLE SEWING MACHINES. Stitch alike on both sides, and is the only LICENSED SHUTTLE MACHINE sold in the United states for less than $40. All others are infringements, and the seller and user are liable to prosecution and imprisonment. Outfit free. Address

W.A. HENDERSON & CO., Cleveland, Ohio.

* * * * *

2d-Hand Machinery

FOR SALE—viz:—

50 Milling Machines, Index and Universal Milling Machines, Horizontal Milling and Drilling Machines, Drill Presses. Hand and Power Lathes, Edging Machines, Drops and Punch Presses, Screw Machines, etc., etc., 1000 feet of 1-3/16 Shafting, with Hangers and Pulleys, etc., etc., by

O.F. WINCHESTER,

New Haven, Conn.

* * * * *

SENT FREE!

M. O'KEEFE, SON & CO.'S

SEED CATALOGUE AND GUIDE TO THE FLOWER AND VEGETABLE GARDEN, FOR 1870.

Published in January. Every lover of flowers wishing this new and valuable work, free of charge, should address immediately M. O'KEEFE, SON & CO., Ellwanger & Barry's Block, Rochester, N.Y.

* * * * *

London

48 Cannon street.

H. KOHNSTAMM,

Manufacturer of ULTRAMARINE,

And Importer of English, French, and German Colors, Paints, and Artists' Materials, Bronzes, and Metals. No. 3 Tryon Row, New York, opposite City Hall

* * * * *

WIRE HOPE.

Manufactured by

JOHN A. ROEBLING'S SONS,

Trenton N.J.

FOR Inclined Planes, Standing Ship Rigging Bridges, Ferries, Stays or Guys on Derricks & Cranes Tiller Ropes, Sash Cords of Copper and Iron, Lightning Conductors of Copper. Special attention given to hoisting rope of all kinds for Mines and Elevators. Apply for circular, giving price and other information. Send for pamphlet on Transmission of Power by Wire Ropes.

* * * * *

THE

Tanite Emery Wheel.

Does not Glaze, Gum, Heat, or Smell. Address

THE TANITE CO.,

Stroudsburg, Monroe Co., Pa.

* * * * *

GETTY'S PATENT PIPE CUTTER.

No. 1 cuts from 1 inch to 1/8........................Price $8 No. 2 cuts from 2 inches to ........................Price $10

GETTY'S PATENT PROVING PUMP AND GAGE. Pump and Gage.......................................Price $25 Gage alone..........................................Price $13

Address

McNAB & HARLIN,

MANUFACTURERS OF BRASS GOODS AND IRON FITTINGS,

86 John st., New York.

* * * * *

REPEATING FIRE-ARMS

FOR SALE, viz:—

5,000 Winchester Repeating Muskets. 5,000 " " Carbines. 5,000 " " Sporting Rifles. 2,000 Spencer " Muskets. 30,000 " " Carbines. 500 " " Sporting Rifles. 2,000 Joslyn Single Breech-loading Carbines.

Metallic Cartridges of all sizes, by

WINCHESTER REPEATING ARMS CO.,

New Haven, Conn.

* * * * *

PAT. SOLID EMERY WHEELS AND OIL STONES, for Brass and Iron Work, Saw Mills, and Edge Tools. Northampton Emery Wheel Co., Leeds. Mass.

* * * * *

KIDDER'S PASTILES—A Sure Relief for Asthma. STOWELL & CO., Charlestown, Mass.

* * * * *

WELBY & McCAULEY,

PRACTICAL MECHANICS.—Mechanical Commission Depot No. 5, Harrison st., Baltimore, Md., Buy and Sell, on Commission, Improved Machinery, etc., etc. Negotiate Patent Rights, introduce New Inventions, practically. Agents for manufacturers generally.

* * * * *

The American Builder

AND JOURNAL OF ART.—Terms $3.00 a year. Sent four months to trial Subscribers on receipt of one dollar. Address

CHARLES D. LAKEY

Chicago, Ill.

* * * * *

Cotton Seed Oil Mills.

Built by Contractor otherwise. For Estimates and Machinery apply to Oil Machinery Manufacturing Co. of N.Y. city, 96 Liberty st. P.O. Box 1183

* * * * *

HARRISON

SAFETY

BOILER

First-Class Medal World's Fair, London, 1862.

First-Class Medal, American Institute Fair, New York, October, 1869, for safety, economy of space, and economy of fuel.

400-H.P. AT A.T. STEWART'S.

437-H.P. AT JERSEY CITY SUGAR REFINERY, and over 1,000 boilers in other places.

Harrison Boiler Works, Philadelphia.

John A. Coleman, Ag't,

49 Murray St., N. Y., and 36 Kilby St., Boston.

* * * * *

30-H. Corliss Engine.

Also, Six Engines, from 15 to 30-Horse. Have been in use, but are in good order. Cheap for cash. Address

CHAS. H. SMITH,

135 North 3d st., Philadelphia, Pa.

* * * * *

Drawing Materials.

WHATMAN'S PAPERS.—White and Yellow Roll Drawing Paper, 40 and 54 inches wide Tracing Muslin, Tracing Paper. Muslin-backed Drawing Paper, 40 and 53 inches wide. Winsor & Newton's Colors India Ink. Faber's Drawing Pencils, etc., etc. Priced catalogues 10 cents each.

JAS. W. QUEEN & CO.,

924 Chestnut st. Philadelphia.

* * * * *

SAWS. EVERY DESCIPTION

Guaranteed under a forfeiture of $1000, to cut the most lumber with the least expense.

Henry Disston & Son,

PHILADELPHIA. Special attention paid to our new style Circular, Belt, Cross-cut, Mill and Hack Saws. Orders received from England, Ireland, and the Continent.

* * * * *



THE Scientific American FOR 1870



Cash Prize and Premium List

This Illustrated Weekly Journal of

Practical Information, Art, Science, Mechanics, Invention, Chemistry, and Manufactures—Entered its Twenty-fifth Year on the 1st of January.

The SCIENTIFIC AMERICAN stands at the head of Industrial Journals of the world in point of Circulation and Influence.

Every number has Sixteen Imperial pages, embellished with Engravings of New Inventions, Machinery, Tools for the Workshop, House, and Farm, also Public Buildings, Dwelling Houses, and Engineering Works.

The Illustrated Department of the SCIENTIFIC AMERICAN is a very striking feature, and has elicited the praise of the Press and all articles appearing in its columns are written in a popular and instructive style.

To Inventors and Mechanics the SCIENTIFIC AMERICAN has special value and interest, from the fact that it furnishes an Official List of Patents issued, with copious notes of the principal American and European Patents.

The Publishers offer the following

SCHEDULE OF CASH PRIZES.

For the fifteen largest lists of names sent in before February 10, 1870, the following Cash Prizes will be given:

$300 FOR THE FIRST LIST. 250 " SECOND LIST. 200 " THIRD LIST. 150 " FOURTH LIST. 100 " FIFTH LIST. 90 " SIXTH LIST. 80 " SEVENTH LIST 70 " EIGHTH LIST. 60 " NINTH LIST. 50 " TENTH LIST. 40 " ELEVENTH LIST. 35 " TWELFTH LIST. 30 " THIRTEENTH LIST. 25 " FOURTEENTH LIST. 20 " FIFTEENTH LIST.

Competitors sending names should be particular to mark "Prize List" on their orders, and remit the amount of subscription, as per terms. All Clubs of 10 names and upward, will be taken at the rate of $2.50 per annum.

To those who do not compete for the Cash Prizes the publishers offer the Splendid Steel Engraving, in size 22x36, entitled "MEN OF PROGRESS-AMERICAN INVENTORS." It contains the following group of illustrious inventors, namely: Prof. Morse, Prof. Henry Thomas Blanchard, Dr. Nott, Isaiah Jennings, Charles Goodyear, Jos. Saxton, Dr. W. T. Morton, Erastus Bigelow, Henry Burden, Capt. John Ericsson, Elias Howe, Jr., Col. Samuel Colt, Col. R. M. Hoe, Peter Cooper, Jordan L. Mott, C. H. McCormick, James Bogardus, and Frederick E. Sickles. The likenesses are all excellent, and Mr. Sartain, who stands at the head of our American Engravers on Steel, in a letter addressed to us, says "that it would cost $4,000 to engrave the plate now," which is a sufficient guarantee of the very high character of the Engraving as a work of art. Price of the Engraving, $10 for single copy. To enable all to possess this beautiful work of art, at, a very reduced rate, the SCIENTIFIC AMERICAN will be sent one year, together with a copy of the picture, on receipt of $10

Any one sending 10 Names for 1 year, and $30, will receive one picture 20 " " 50, " " " 30 " " 75, " two pictures 40 " " 100, " three " 50 " " 125, " four "

Competitors for the above prizes can send in names at any time on or before February 10th, and from any postoffice. For full particulars and sample copies of the SCIENTIFIC AMERICAN, address the Publishers.

Terms of the SCIENTIFIC AMERICAN: Single copy one year, $3.00; six months, $1.50; and one dollar four months. To Clubs of ten and upward, $2.50 each per annum.

MUNN & CO.,

37 Park Row, New York

THE END