Chapter L: B. TUPPER, 120 West st., New York

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PYROMETERS.

For Blast Furnaces, Bakers' Ovens, Boiler Flues, Superheated Steam Oil Stills, Zinc and Lead Baths. E. BROWN, 311 Walnut st., Philadelphia.

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_AGENTS WANTED._

To sell the UNIVERSAL SASH LOCK. IT IS SELF-ACTING AND BURGLAR-PROOF. Send stamp for circulars. Carpenters and Builders can make from $10 to $20 selling them. Address G. S. LACEY, care of Patterson Brothers, No. 27 Park Row, New York city.

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SPERM OIL, _strictly pure_, for SEWING MACHINES and fine Machinery, in bottles and bbls.

Sample by mail, 25 cts. W. F. NYE, New Bedford, Mass.

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_THE REASONS WHY_

DOOLEY'S YEAST POWDER is preferred to any other Baking Powder in market, are owing to its perfect purity, quality, quantity, and economy. The ingredients are strictly free from deleterious substances, and hence the full strength of each is obtained, and the results are uniform every time it is used. This cannot be the case in those of ordinary manufacture, and for proof of our assertion, we ask those who have never used DOOLEY'S YEAST POWDER to give it a trial. Your grocer keeps it. DOOLEY & BROTHER, Manufacturers, 69 New st., New York.

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PATENT CUTTERS for the Teeth of Gear Wheels, which can be sharpened by grinding, without changing their form. Cutters made on this plan will last many times as long as those of the common form, with the advantage of being always ready for use. Descriptive circular, with price list, sent per mail on application. BROWN & SHARPE M'F'G CO., Providence, R. I.

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A SPRING OF WATER AT THE TOP OF THE HOUSE.

HOUGHTON'S AUTOMATIC WATER ELEVATOR, patented Feb. 7, 1871, No. 111,542, delivers water from the well or cistern in the tank at the top of the house. Is operated by the fire in the kitchen range without additional fuel; is simple in construction, reliable and cheap. Reliable parties wanted to introduce them into use in all the States except New England. For drawings and full description address

CHARLES HOUGHTON, 41 State St., Boston, Mass.

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SHORT HAND.--150 words per minute in four weeks. Send stamp for Circular.

PROF. GRAY, P. O. Box 4847, New York.

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WATCHES THAT ARE WATCHES.

WE SHALL BE PLEASED TO SEND OUR DESCRIPTIVE PRICE LIST OF GENUINE WALTHAM WATCHES, TOGETHER WITH AN ILLUSTRATED PAMPHLET ENTITLED A HISTORY OF WATCHMAKING, TO ALL WHO SEND US THEIR ADDRESS. NO MATTER HOW REMOTE YOU ARE FROM NEW YORK, WE CAN SELL YOU A WATCH AT THE SAME PRICE AS IF YOU WERE HERE. WHEN YOU WRITE MENTION THAT YOU SAW THIS NOTICE IN THE SCIENTIFIC AMER. HOWARD & CO., 865 BROADWAY, N. Y.

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ENGINES, TOOLS, MACHINERY, ETC., FOR SALE AT THE NOVELTY IRON WORKS, FOOT OF EAST 12TH STREET, NEW YORK CITY,

EMBRACING Engines, Planers, Lathes, Smith and Boiler Makers' Tools, and Machinery and Patterns of the most approved kinds, etc. Also, 1 High Pressure Engine, 12-inch diameter by 30-inch stroke: 2 Stevenson's Patent Turbine Water Wheels, 66-inch diameter, and 1 Marine Beam Engine, 60-inches by 10-feet stroke. Send for catalogue.

JNO. S. SCHULTZE,

RECEIVER OF THE NOVELTY IRON WORKS. New York, March 1, 1871.

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FOR CIRCULAR ILLUSTRATING A NEW and greatly improved TURBINE WHEEL, believed to be the best and cheapest in the market, apply to

PUSEY JONES & CO., Wilmington, Delaware

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HOTCHKISS BRICK AND TILE MACHINE.--Send for Circular to Room 7, No. 19 Cliff street, New York.

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PRATT'S ASTRAL OIL:

Not the cheapest, but the best Illuminating Oil ever made. Does not take fire or explode if the lamp be upset or broken. Over 100,000 families continue to use it, and no accidents of any description, directly or indirectly, have occurred from it.

Oil House of CHARLES PRATT, Established 1770, New York.

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UNION SPOKE WORKS.

SPOKES, RIMS, AND PLOW HANDLES. All goods warranted seasoned, and of the best quality.

JOHN G. DAVIS & SON, Southwest cor. of Leopard and Otter sts., Philadelphia.

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Vertical & Horizontal CORN MILLS. 30-inch grinds 30 bus. per hour, and 20-in. 15. Price $280 and $140. EDWARD HARRISON, New Haven, Conn.

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IRON STEAMSHIP BUILDERS. NEAFIE & LEVY, PENN WORKS, MARINE ENGINES, BOILERS, ETC., PHILADELPHIA, PA.

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SWAIN TURBINE.

"OUR LOW-WATER WHEEL FROM THIS ON"

WILL DO TEN PER CENT MORE WORK on small streams, in a dry season, than any wheel ever invented. Gave the best results, in every respect, at the Lowell Tests.

For Report of tests at Lowell, with Diagrams and Tables of Power, address

THE SWAIN TURBINE CO., NORTH CHELMSFORD, MASS.

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BUILDING PAPER OF THREE GRADES. TARRED SHEATHING,

For outside of Studding, under Clapboards. A non-conductor of cold, heat, and dampness.

PREPARED PLASTERING BOARD,

a cheap and perfect substitute for lath and plaster; makes a smooth, warm, and substantial wall, at less than half the usual cost.

DOUBLE THICK ROOFING

and Quartz Cement, make a good water and fire-proof roof, for less than $3.50 per square.

Sample and Circulars sent free, by ROCK RIVER PAPER CO., Chicago; or, B. E. HALE, 22 & 24 Frankfort street, N. Y.

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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.

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_RUMPFF & LUTZ,_

IMPORTERS and Manufacturers of Aniline Colors and Dyestuffs, Colors for Paperhangers and Stainers. Reliable recipes for Dyeing and Printing on Silk, Wool, and Cotton. All new improvements in the art of Dyeing, and new Colors are transmitted to us by our friends in Europe, as soon as they appear.

42 Beaver street, New York.

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PAGE'S _PATENT TANNED BELTING_

Runs 25 per cent more machinery, is nearly twice as strong, and wears 50 per c. longer than any other. Send for circular containing price lists and discounts.

PAGE BROTHERS, SOLE MANUF'RS, FRANKLIN, N. H.

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STEAM ENGINES & BOILERS

From 4 to 500 horse power including Corliss Engines, Slide Valve Stationary Engines, Portable Engines, etc. Also, Circular Saw Mills, Shafting, Pulleys etc. Wheat and Corn Mills, Circular Saws, etc.

Send for Price List.

WOOD & MANN STEAM ENGINE COMPANY, WORKS--UTICA, N. Y. PRINCIPAL OFFICE--42 CORTLANDT ST., NEW YORK.

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DRILLS DIAMOND POINTED _STEAM DRILLS._

FOR ALL KINDS OF ROCK DRILLING, Mining, Quarrying, Tunneling, Railroad Grading, Well Boring, Prospecting, etc. Fifty to Seventy-five per cent of cost and time of hand labor saved. "Test Cores," in form of solid cylinders of rock or mineral taken out of mines from any depth not exceeding one thousand feet, showing true value, stratification, etc. No percussion. Never require sharpening. FIRST PREMIUMS awarded in both American and Europe. Illustrated Circulars sent on application. Beware of infringements.

SEVERANCE & HOLT, Proprietors and Manufacturers, Office 16 Wall st., New York.

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_NICKEL PLATING._ BEARDSLEE NICKEL AND MANUFACTURING CO., 82 AND 84 FULTON ST., BROOKLYN, N. Y.

RIGHTS sold for the use of, and instruction given in the best method of Nickel Plating. An experience of twelve years enables us to offer a solution and apparatus that remain practically unchanged for years, in constant use.

FIRST PREMIUM AWARDED

us by the AMERICAN INSTITUTE in 1870. Critical examination of our work solicited. All goods sent to our Factory will meet with prompt attention.

New York Office--4 DEV ST., ROOM 2.

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BEST DAMPER REGULATOR for Steam Boiler. Send for Circulars. Agents wanted. MURRILL & KEIZER, Baltimore, Md.

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

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NO LIVE MECHANIC Can afford to be without some of BAIRD'S BOOKS FOR PRACTICAL MEN.

My new and enlarged Catalogue of PRACTICAL AND SCIENTIFIC BOOKS, 82 pages, 8vo., will be sent, free of postage, to any one who will favor me with his address.

HENRY CAREY BAIRD, Industrial Publisher, 406 Walnut St., PHILADELPHIA.

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THE FIFTH GRAND STATE FAIR OF THE MECHANICS AND AGRICULTURAL STATE ASSOCIATION OF LOUISIANA

Will be held on the Fair Grounds of the Association, in the city of New Orleans, commencing SATURDAY, APRIL 8, 1871, and continuing nine days. Exhibitors are invited from every section of America. Railroads, steamships, and other transportation lines, as named in the Premium Catalogues, will carry exhibitors and their wares to and from the Fair at one half the usual rates. For further information see Premium Catalogue, which will be sent to any address free of charge.

LUTHER HOMES, Secretary and Treasurer, New Orleans, La.

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ROOT'S SAFETY BOILER. For Pamphlets with Price List and Testimonials, address ROOT STEAM ENGINE CO,, 2d Ave., cor. 28th st., N. Y. THE BEST IN THE MARKET.

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_WIRE ROPE._ JOHN A. ROEBLING'S SONS, MANUFACTURERS, 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. A large stock constantly on hand at New York Warehouse, No. 117 Liberty street.

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$732 IN 31 DAYS,

Made by one Agent, selling Silver's Broom. 100,000 in use. Recommended by Horace Greeley and _Am. Agriculturist_. One county for each Agent. _Prices Reduced_. C. A. CLEGG & CO., New York, or Chicago, Ill.

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AMERICAN SAW CO., MANUFACTURERS OF

EMERSON'S PATENT MOVEABLE TOOTHED CIRCULAR SAWS]

And Perforated Circular and Long Saws. Also Solid Saws of all kinds. No. 1 Ferry St., cor. Gold street, New York. Branch Office for Pacific Coast, No. 606 Front street, San Francisco, Cal.

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_MACHINE SCREWS,_ For all purposes, with square, round, and hexagon heads. A. W. GIFFORD & CO., Worcester, Mass.

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PATENT COLD ROLLED SHAFTING.

The fact that this Shafting has 75 per cent greater strength, a finer finish, and is truer to gage, than any other in use, renders it undoubtedly the most economical. We are also the sole manufacturers of the CELEBRATED COLLINS PAT. COUPLING, and furnish Pulleys, Hangers, etc., of the most approved styles. Price Lists mailed on application to

JONES & LAUGHLINS, 120 Water street, Pittsburgh, Pa.

---> Stocks of this Shafting in store and for sale by

FULLER, DANA & FITZ, Boston, Mass. GEO. PLACE & CO., 126 Chambers street, N. Y.

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SCHLENKER'S PATENT BOLT CUTTER NEW INVENTION. ADDRESS, HOWARD IRON WORKS, BUFFALO, N. Y. ]

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_STEAM SUPER-HEATER,_

For Saving Fuel, and supplying Dry Steam of any desired temperature. Safe, durable, easily attached.

H. W. BULKLEY Engineer, 98 Liberty st., N. Y.

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FOR CIRCULAR OF TREMPER'S PATENT VARIABLE CUT-OFF, for high and low pressure Steam Engines, address

PUSEY JONES & CO. Wilmington Delaware.

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HARRISON SAFETY BOILER.

First-class Medal, World's Fair, London, 1862. And American Institute Fair, New York, 1869.

Over 1,000 Boilers in Use.

WESTON'S PATENT DIFFERENTIAL

PULLEY BLOCKS.

75,000 IN USE.

Address HARRISON BOILER WORKS, PHILADELPHIA, PA. or, JOHN A. COLEMAN, Agent, 110 Broadway, New York, and 139 Federal st., Boston.

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_DOYLE'S_ PATENT DIFFERENTIAL PULLEY BLOCKS,

The celebrated DOYLE BLOCKS have taken premiums over the differential Blocks of all other makers at every Fair where they have been exhibited at the same time. WHEN YOU BUY, SEE THAT THE BLOCKS ARE MARKED J. J. DOYLE. Pat. Jan. 8, 1861. All others are infringements.

SAMUEL HALL'S SON & CO., SOLE MANUFACTURERS. 229 WEST 10TH STREET, NEW YORK.

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HEAVY CASTINGS FOR FORGE AND MILL WORK. The M. & T. SAULT CO. Steam Engine Builders & Founders, New Haven, Conn.

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EMPLOYMENT.

$250 A MONTH with Stencil Dies. Samples free. Address

S. M. SPENCER Brattleboro Vt.

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THE TANITE EMERY WHEEL. Does not Glaze, Gum, Heat, or Smell. Address THE TANITE CO., Stroudsburg, Monroe Co., Pa.

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A. S. & J. GEAR & CO., Boston, furnish every description of Wood and Iron Working Machinery and Supplies. The best in use, regardless of maker, at lowest possible rates.

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_WORKING MODELS_

And Experimental Machinery, Metal, or Wood, made to order, by J. F. WERNER 62 Center st. N. Y.

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McNAB & HARLAN, Manufacturers of Wrought Iron Pipe and Fittings, Brass Cocks, Valves, Gage Cocks, Whistles, Water Gages, and Oil Cups, Harlin's Patent Lubricator, Plumber's Brass Work, Getty's Patent Pipe Cutter, Getty's Patent Proving Pump and Gage. No. 86 John st., New York.

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THE ALLEN ENGINE WORKS, THE ALLEN ENGINE.

Fourth avenue and 130th and 131st sts., New York city Manufacturers of

PORTER'S GOVERNOR, THE ALLEN BOILER, AND STANDARD STRAIGHT EDGES, SURFACE PLATES, AND ANGLE PLATES.

Four first premiums were awarded to us at the Fair of the American Institute, 1870.

Send for our illustrated circular.

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_L. W. POND--NEW TOOLS._

EXTRA HEAVY AND IMPROVED PATTERNS.

LATHES, PLANERS, DRILLS, of all sizes; Vertical Boring Mills, ten feet swing, and under; Milling Machines, Gear and Bolt Cutters; Hand Punches and Shears for Iron.

Office and Warerooms, 98 Liberty st., New York; Works at Worcester, Mass.

A. C. STEBBINS, New York, Agent.

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WATER-PROOF _BUILDING PAPER_

(No Tar), for Roofing, Sheathing, Ceilings, Oil-cloths, Shoe Stiffenings, Tags, Trunks, Cartridges, Blasting, Pass-book Covers, Grain and Flour Bins, etc., for sale by

J. HUNTER, JR., Paper Warehouse, 59 Duane st., New York.

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SCIENTIFIC AMERICAN

FOR 1871.

TWENTY-SIXTH YEAR.

EVERY NUMBER is printed on fine paper, and elegantly illustrated with original engravings representing

NEW INVENTIONS, NOVELTIES IN MECHANICS, MANUFACTURES, CHEMISTRY, PHOTOGRAPHY, ARCHITECTURE. AGRICULTURE. ENGINEERING, SCIENCE, AND ART.

Farmers, Mechanics, Inventors, Engineers, Chemists Manufacturers and People of all Professions or Trades will find the

SCIENTIFIC AMERICAN

of great value and interest.

The Editors are assisted by many of the ablest American and European Writers, and having access to all the leading Scientific and Mechanical Journals of the world, the columns of the SCIENTIFIC AMERICAN are constantly enriched with the choicest Information.

An Official List of all the Patents Issued is published Weekly.

The Yearly Numbers of the SCIENTIFIC AMERICAN make two splendid Volumes of nearly ONE THOUSAND PAGES equivalent in size to FOUR THOUSAND ordinary book pages.

SPECIMEN COPIES SENT FREE.

TERMS--$3.00 a year, $1.50 half year; Clubs of Ten Copies for one year, at $2.50 each, $25.00,

With a SPLENDID PREMIUM to the person who forms the Club, consisting of a copy of the celebrated Steel Plate Engraving, "Men of Progress."

Address

MUNN & CO., PUBLISHERS OF THE SCIENTIFIC AMERICAN. 37 PARK ROW, NEW YORK.

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THE "Scientific American" is printed with CHAS. ENEU JOHNSON & CO.'S INK. Tenth and Lombard sts. Philadelphia, and 59 Gold st. New York.