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P. H. & F. M. ROOTS, Manuf'rs, CONNERSVILLE, IND.
S. S. TOWNSEND, Gen. Agt., 6 Cortlandt St., 8 Dey Street, NEW YORK.
WM. COOKE, Selling Agt., 6 Cortlandt Street, NEW YORK.
JAS. BEGGS & CO., Selling Agts., 8 Dey Street, NEW YORK.
SEND FOR PRICED CATALOGUE.
POST OFFICE DEPARTMENT,WASHINGTON. D. C., October 23, 1880.
SEALED PROPOSALS will be received at this Department,until 12 o'clock, noon, on the 26th day of January, 1881, for furnishing a new kind of mail locks and keys for the sole and exclusive use of the United States through registered mails.
As the public exposure and searching examination necessary to intelligent bidding on any prescribed model of a lock and key would tend to impair, if not entirely destroy, the further utility of such locks and keys for the purposes of the mails, the Postmaster General prescribes no model or sample for bidders, but relies for a selection on the mechanical skill and ingenuity which a fair competition among inventors, hereby invited, may develop in samples submitted by them.
Specifications of the conditions and requirements relating to proposals, samples, contract, etc., as well as forms of proposal, will be furnished on application by letter to the Second Assistant Postmaster General.
No proposal will be considered unless it shall have been submitted in accordance with such specification and forms.
The contracts which may be made will be in conformity to the specifications and the accepted proposal. But the right is, however, reserved to reject any and all of the proposals.
JAS. N. TYNER,Acting Postmaster General.
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Foot and Power Lathes, Drill Presses, Scrolls, Circular and Band Saws, Saw Attachments, Chucks, Mandrels, Twist Drills, Dogs, Calipers, etc. Send for catalogue of outfits for amateurs or artisans.
H. L. SHEPARD & CO.,331, 333, 335, & 337 West Front Street,Cincinnati, Ohio.
HUB MACHINERY.—HUB TURNING, HUB MORTISING, and Hub Boring Machines. Send for price list and circulars. DAVID JENKINS, Sheboygan, Wis.
For steep or flat roofs. Applied by ordinary workmen at one-third the cost of tin. Circulars and samples free. Agents Wanted. T. NEW, 32 John Street, New York.
The fact that this shafting has 75 per cent. greater strength, a finer finish, and is truer to gauge, than any other in use renders it undoubtedly the most economical. We are also the sole manufacturers of theCelebrated Collins' Pat. Coupling, and furnish Pulleys, Hangers, etc., of the most approved styles. Price list mailed on application to
JONES & LAUGHLINS, Try Street, 2d and 3d Avenues, Pittsburg, Pa.190 S. Canal Street, Chicago, Ill.
Stocks of this shafting in store and for sale by FULLER, DANA & FITZ, Boston, Mass. Geo. Place Machinery Agency, 121 Chambers St., N. Y.
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Complete sets of
CASTINGS
for making small Model steam Engines 1-1/2 in. bore, 3 in. stroke, price,$4; ditto 2 in. bore, 4 in. stroke, price, $10, same style as cut. Gear Wheels and Parts of Models. All kinds of Small Tools and Materials. Catalogue Free. GOODNOW & WIGHTMAN, 176 Washington Street, Boston, Mass.
in the market toLondon, Berry & Orton, Phila., Pa.
coe brass
New and Improved Patterns.Send for new illustrated catalogue.
Lathes, Planers, Drills, &c.
NEW HAVEN MANUFACTURING CO.,New Haven, Conn.
Send for Catalogue.
R. SIMPSON, 132 Nassau St., N. Y.
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The New Economizer, the only Agricultural Engine with Return Flue Boiler in use. Send for circular toPorter MFG. Co., Limited, Syracuse. N. Y.
G. G. YOUNG, Gen. Agt., 42 Cortland St., New York.
Inside Page, each insertion—75 cents a line.
Back Page, each insertion—$1.00 a line.
(About eight words to a line.)
Engravings may head advertisements at the same rate per line, by measurement, as the letter press. Advertisements must be received at publication office as early as Thursday morning to appear in next issue.
The publishers of this paper guarantee to advertisers a circulation of not less than 50,000 copies every weekly issue.
A special Holiday number, designed for boys and girls everywhere, whether regular readers of the magazine or not;—the best, and, by reason of its immense edition, 105,000, the cheapest Christmas book published, Price 30 cents.
A brilliant Holiday cover; superb pictures by the best American artists; a capital acting operetta for children "The Land of Nod," with words and music; a splendid story by Washington Gladden, "A Christmas Dinner with the Man in the Moon," the illustrations of which rivalDore's; "King Arthur and his Knights," by Sidney Lanier; one of Frank R. Stockton's inimitable FAIRY STORIES; the "Treasure Box of Literature," etc., etc.;—in all, thirty-three departments and contributions.
A Grand Holiday Gift-Book of 100 Pages,printed on tinted paper, illustrated with scores of charming pictures, for only 30 cents. Ask for the Christmas (December)St. Nicholas. Four editions of last year's Holiday number were demanded. For sale everywhere. Subscription price, $3.00 per year.
Scribner & Co., 743 Broadway, N. Y.
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For a Machine that willSaw as Fast and Easyas this one.
This is the King of Saw Machines. It saws off a 2 foot log in 2 minutes. 20,000 in use. The cheapest machine made, and fully warranted. Circular free. United States Manufacturing Co., Chicago, Ill.
on the goods whenever you buy
37 & 38 PARK ROW, NEW YORK.
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Watchman's Improved Time Detector, with Safety Lock Attachment, Patented 1875-6-7. Beware of Infringements. This Instrument is supplied with 12 keys for 12 different stations. Invaluable for all concerns employing night watchmen. Send for circulars to E. IMHAUSER, P. O. Box 2875. 212 Broadway, New York.
We make Burr Millstones, Portable Mills, Smut Machines, Packers, Mill Picks, Water Wheels, Pulleys, and Gearing specially adapted to Flour Mills. Send for catalogue.
J. T. NOYE & SONS, Buffalo, N. Y.
THE NEW
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Is more economical in points of original cost, expense for repairs and running expenses, than any other Steam Pump in the World.
Simple and compact, with no machinery whatever to oil, or get out of order, it stands at the head of all means of elevating water or other liquids by steam.It needs no skilled labor to look after it.
Send for book giving full description, reduced prices and many letters of commendation from leading manufacturers and others throughout the country who are using them.
Pulsometer Steam Pump Co., Sole Owners of Hall's Patents in the U. S., 131,515 to 131,543, both inclusive, and theNEW PULSOMETER,Office, No. 83 John St., P.O. Box No. 1533. New York City.
P.O. Box 3083 142 Greenwich St., New York. Guaranteed to be the mostefficientandeconomicalof all existing Ice and Cold Air Machines.
LIQUID PAINTS, ROOFING,
Steam Pipe & Boiler Coverings, Steam Packing, Mill Board, Sheathing, Fire Proof Coatings, &c.
Send for Descriptive Price List.
H. W. JOHNS M'F'G CO. 87 MAIDEN LANE, N. Y.
$66a week in your own town. Terms and $5 outfit free. AddressH. Hallett & Co., Portland, Me.
Machinery of Every Description.
121 Chambers and 103 Beade Streets, New York.
THE TANITE CO., Stroudsburg, Monroe Comity, Pa.
Orders may be directed to us at any of the following addresses, at each of which we carry a stock:
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Before ordering engraving of any kind, send to us for estimates and samples. We have the largest engraving establishment in the world, and the best facilities for doing work of the best quality, quickly and cheaply.
67 & 69 Park Place, New York.
Inspection & Insurance
W. B. FRANKLIN, V. Pres't, J. M. ALLEN, Pres't. J. B. PIERCE, Sec'y.
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The Bicycle has proved itself to be a permanent, practical road vehicle, and the number in daily use is rapidly increasing. Professional and business men, seekers after health or pleasure, all join in bearing witness to its merits. Send 3 cent stamp for catalogue with price list and full information.
THE POPE M'F'G CO.,89 Summer Street, Boston, Mass.
BY SECURING THE
By employing Agents for 500 Manufacturers.By manufacturing rapid selling articles.By getting, through means of the Cabinet, the best agencies in the world.
Address J. B. CHAPMAN,12West St., Madison, Ind.
TELEPHONEand Electrical Supplies Send for Catalogue.
C. E. JONES & BRO., CINCINNATI, O.
STURTEVANTS' FAN BLOWERS.
ALBERT BRIDGES, 46 Cortlandt Street, New York.
james watson
Plastic Cement and Hair Felt, with or without the
Patent"AIR SPACE"Method.
Made from pure Italian Asbestos in fiber mill board and round packing. THE CHALMERS-SPENCE CO., 40 John Street, and Foot of E. 9th Street, New York.
Perfectly Smooth Thoroughly Seasoned
Manufactured by our Patent Board Cutting Machines and Seasoning Presses.
Pronounced the only Perfect Cut Lumber!!
Rosewood, Satinwood, Walnut, Ash, Red Cedar, Cherry, Oak, Poplar, Maple, Holly, French Walnut, etc., etc.. in Logs, Planks, Boards, and Veneers.
Send for catalogue and price lists.
GEO. W. READ & CO.,186 to 200 Lewis St. foot 5th and 6th Sts., New York.
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SNOW'S BESTWater WheelGovernor,
MANUFACTURED BYCOHOES IRON FOUNDRYAND MACHINE, CO.,COHOES, N.Y.
$55.66Agents' profit per week. Will prove it or forfeit $500.00. Outfit and Samples worth $5.00 free. Address E. G. RIDEOUT & CO., 10 Barclay Street, New York.
From 1/4 to 15,000 lb. weight, true to pattern, of unequaled strength, toughness, and durability. 15,000 Crank Shafts and 10,000 Gear Wheels of this steel now running prove its superiority over other Steel Castings. Send for circular and price list.
Chester Steel Castings Co., 407 Library St., Phila, Pa.
For showing heat of Ovens, Hot Blast Pipes, Boiler Flues Superheated Steam, Oil Stills, etc.
HENRY W. BULKLEY, Sole Manufacturer, 149 Broadway, N.Y.
Six minutes walk West from station.
Original and Only builder of the
With Harris' Patented Improvements, from 10 to 1,000 H. P.
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At Low Prices. Large Assorted Stock. A. & F. BROWN, 57-61 Lewis St., New York.
THE BAKER BLOWER,Centennial Judges Report.
"Good Design and Material. Very efficient in action. With the special advantages that they can be connected for motion directly with engine without the use of gearing or belting."
SEND FOR CATALOGUE.
No. 2518 Frankford Avenue, PHILADELPHIA, PA.
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MICROSCOPES, OPERA GLASSES, SPYGlasses, Spectacles, Thermometers, Barometers, Compasses. R. & J. BECK, Manufacturing Opticians. Philadelphia, Pa. Send forIllustrated Priced Catalogue.
Successors toHoward, Sanger & Co., OWNERS OF
MANUFACTURE AND INTRODUCE
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THE ONLY
Real Pocket
Scale IN THE MARKET.
MADE OF METAL,
Heavily Nickel Plated,
COMPACT,STRONG,DURABLE.
Can be carried in the Vest Pocket.
Each one warranted absolutely accurate.
Weighs up to 8 lbs.
Sample by mail on receipt of price.
A liberal discount to the trade.
No. 1—"Post Office," weighs to 8 ozs.
No. 2—"Pocket," weighs to 8 lbs.
Howard Manufacturing Co., Box 2295, New York.
BOGARDUS' PATENT UNIVERSAL ECCENTRIC MILLS—For grinding Bones, Ores, Sand, Old Crucibles, Fire Clay, Guanos, Oil Cake, Feed, Corn, Corn and Cob, Tobacco, Snuff, Sugar, Salts, Roots, Spices, Coffee, Cocoanut, Flaxseed, Asbestos, Mica etc., and whatever cannot be ground by other mills, Also for Paints, Printers' Inks, Paste Blacking, etc. JOHN W. THOMSON, successor to JAMES BOGARDUS, corner of White and Elm Sts., New York.
THE
21 Courtland St., New York, Rooms 54, 55.
LOW PRESSURE BINARY ABSORPTION SYSTEM
Machines Making
Low Pressure when running. No pressure at rest. Machines guaranteed by C. H. Delamater & Co.
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Our new Stylographic Pen (just patented), having the duplex interchangeable point section, is the very latest improvement. THE STYLOGRAPHIC PEN CO., Room 13, 169 Broadway, New York. Send for circular.
Unequaled in
TONE,TOUCH,WORKMANSHIP, &DURABILITY.
Warerooms112 Fifth Avenue. New York.204 & 206 W. Baltimore St., Baltimore.
THE RAYMOND M'F'G CO.,642 West 52d St., 108 Liberty St., New York.
STILES & PARKER PRESS CO., Middletown, Conn.
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DO YOUR OWN PRINTING $3PRESS prints &c. (Self-inker $4) Larger sizes for larger work. For old or young. Great money saver. A paying business anywhere for all or spare time. Send two stamps for a catalogue of all sizes. Presses, Type, Cards, Paper &c., to the Manufacturers KELSEY & CO., Meriden, Conn.
Miners and Manufacturers of Asbestos,
PATENTED ASBESTOS ROPE PACKING,PATENTED ASBESTOS LOOSE PACKINGPATENTED ASBESTOS JOURNAL PACKINGPATENTED ASBESTOS WICK PACKINGPATENTED ASBESTOS MILL BOARD,PATENTED ASBESTOS SHEATHING PAPER,PATENTED ASBESTOS FLOORING FELT,PATENTED ASBESTOS CLOTH.
Prospectus
OF THE
FOR 1881.
The Most Popular Scientific Paper in the World.
VOLUME XLIV. NEW SERIES.
Only $3.20 a Year, including postage. Weekly, 52 Numbers a Year.
This widely circulatedand splendidly illustrated paper is published weekly. Every number contains sixteen pages of useful information, and a large number of original engravings of new inventions and discoveries, representing Engineering Works, Steam Machinery, New Inventions, Novelties in Mechanics, Manufactures, Chemistry, Electricity, Telegraphy, Photography, Architecture, Agriculture, Horticulture, Natural History, etc.
All Classes of Readersfind inThe Scientific Americana popularresumeof the best scientific information of the day; and it is the aim of the publishers to present it in an attractive form, avoiding as much as possible abstruse terms. To every intelligent mind, this journal affords a constant supply of instructive reading. It is promotive of knowledge and progress in every community where it circulates.
Terms of Subscription.—One copy ofThe Scientific Americanwill be sent forone year—52 numbers—postage prepaid, to any subscriber in the United States or Canada, on receipt of three dollars and twenty cents by the publishers; six months, $1.60; three months, $1.00.
Clubs.—One extra copyofThe Scientific Americanwill be supplied gratisfor every club of five subscribersat $3.20 each; additional copies at same proportionate rate.
One copy ofThe Scientific Americanand one copy ofThe Scientific American Supplementwill be sent for one year, postage prepaid, to any subscriber in the United States or Canada, on receipt of seven dollars by the publishers.
The safest way to remit is by Postal Order, Draft, or Express. Money carefully placed inside of envelopes, securely sealed, and correctly addressed, seldom goes astray, but is at the sender's risk. Address all letters and make all orders, drafts, etc., payable to
MUNN & CO.,37 Park Row, New York.
To Foreign Subscribers.—Under the facilities of the Postal Union, theScientific Americanis now sent by post direct from New York, with regularity, to subscribers in Great Britain, India, Australia, and all other British colonies; to France, Austria, Belgium, Germany, Russia, and all other European States; Japan, Brazil, Mexico, and all States of Central and South America. Terms, when sent to foreign countries, Canada excepted, $4, gold, forScientific American, 1 year; $9, gold, for bothScientific AmericanandSupplementfor 1 year. This includes postage, which we pay. Remit by postal order or draft to order of Munn & Co., 37 Park Row, New York.
THE "Scientific American" is printed with CHAS. ENEU JOHNSON & CO.'S INK. Tenth and Lombard Sts., Philadelphia, and 50 Gold St. New York.