THE TANITE CO.,

Stroudsburg, Monroe County, Pa.

Orders may be directed to us at any of the following addresses, at each ofwhich we carry a stock:

London, Eng., 9 St. Andrews St.,
Holborn Viaduct, E. C.
Sydney, N. S. W., 11 Pitt St.
Chicago, 152 and 154 Lake St.
Cincinnati, 212 West Second St.
Indianapolis, Corner Maryland and
Delaware Sts.
New Orleans, 26 Union St.
Liverpool, Eng., 42, The Temple, Dale St.
San Francisco, 2 and 4 California St.
St. Louis, 209 North Third St.
" " 811 to 819 North Second St.
Louisville, 427 West Main St.
Nashville, 28 West Side PublicSquare.

The New York Ice Machine Company,

21 Courtlandt Street. Room 54.

Low Pressure Binary Absorption System.

Advantages over other Machines.

Makes 25 per cent. more Ice. Uses only ¼ water of condensation.No Pressure at rest. Pressure in running,14 pounds. Self-lubricating. No Leaks, non-inflammable.No action on Metals. Easy Attendance.


WM. A. HARRIS.

PROVIDENCE, R. I. (PARK STREET),

Six minutes walk West from station.
Original and Only builder of the

HARRIS-CORLISS ENGINE

With Harris' Patented Improvements,
from 10 to 1,000 H.P.


THE BAKER BLOWER.

Centennial Judges Report.

"Good Design and Material. Veryefficient in action. With the special advantagesthat they can be connectedfor motion directly with engine withoutthe use of gearing or belting."

SEND FOR CATALOGUE.

WILBRAHAM BROS.No. 2318 Frankford Avenue,PHILADELPHIA, PA.



BOILER COVERINGS,

Plastic Cement and Hair Felt, with or without the

Patent AIR SPACE Method.

ASBESTOS MATERIALS,

Made from pure Italian Asbestos, in fiber, mill board, andround packing.

THE CHALMERS-SPENCE CO.,

40 John Street, and Foot of E. 9th Street, New York.


TELEGRAPH and Electrical Supplies.
Send for Catalogue.

C. E. JONES & BRO., CINCINNATI, O.


WOOD SOLE SHOES.

The cheapest, most durable,warm, good looking, and thoroughlywaterproof shoe. Particularlyadapted to Brewers,Miners, and all classes of laborers.Send stamp for circularand price list.

CHAS. W. COPELAND,
122 Summer St., Boston, Mass.


BUY NO BOOTS OR SHOES

Unless the soles are protected from wear by Goodrich'sBessemer Steel Rivets. Guaranteed to outwear any othersole. All dealers sell these boots. Taps by mail for 50cents in stamps. Send paper pattern of size wanted.

H. C. GOODRICH, 19 Church St., Worcester, Mass.


SPY Glasses, Field & Opera Glasses, MICROSCOPES,
McALLISTER Magnifying Glasses. Circulars free.
Mfg Optician, 49 Nassau St., N. Y.



PAINTERS attention: send for circulars.etc. of my latest Metallic Plates for grainingoak, walnut, chestnut, ash, etc, in themost rapid and excellent manner, no skillrequired. J. J. CALLOW. Cleveland. O.


HARTFORD

STEAM BOILER

Inspection & Insurance

COMPANY.

W. B. FRANKLIN, V. Pres't, J. M. ALLEN, Pres't.
J. B. PIERCE, Sec'y.


The Rodier Patent Single Iron Plane.

Made of extra quality iron. Apractical labor saving tool. Cutsagainst the grain equally as wellas with it. Can be adjusted instantlyto cut a coarse or fineshaving, and excels any doubleiron plane ever produced. Address LAFLIN MANUFACTURINGCO., North Elm Street, Westfield, Mass.


Pyrometers,
For showing heat of
Ovens, Hot Blast Pipes,
Boiler Flues. Superheated Steam, Oil Stills, etc.

HENRY W. BULKLEY, Sole Manufacturer,

149 Broadway, N. Y.


THE MACKINNON PEN OR FLUID PENCIL.

Particulars mailed Free.
MACKINNON PEN CO.,
200 Broadway, near Fulton St., N. Y.


FRIEDMANN'S PATENT INJECTOR,

The best

BOILER
FEEDER

In the world.

Simple, Reliable, and Effective.

40,000 IN ACTUAL USE.

NATHAN & DREYFUS,

Sole Manufacturers, NEW YORK.

Send for Descriptive Catalogue.


SUPPLIES FROM

HYDRANT PRESSURE

the cheapest power known.Invaluable for blowingChurch Organs, runningPrinting Presses, SewingMachines in Households,Turning Lathes, ScrollSaws, Grindstones, CoffeeMills, Sausage Machines,Feed Cutters, ElectricLights, Elevators, etc. Itneeds little room, no firingup, fuel, ashes, repairs, engineer,explosion, or delay,no extra insurance, no coalbills. Is noiseless, neat,compact, steady; will workat any pressure of waterabove 15 lb.; at 40 lb. pressurehas 4-horse power, andcapacity up to 6 or 8 horsepower. Prices from $15. to $250. Send for circular to
THE BACKUS WATER MOTOR CO., Newark, N. J.


Pictet Artificial Ice Co., Limited,

P. O. Box 3083.142 Greenwich St., New York.


Guaranteed to be the most efficient and economical of allexisting Ice and Cold Air Machines.


MICROSCOPES, OPERA GLASSES, SPY

Glasses, Spectacles, Thermometers, Barometers,Compasses.
R. & J. BECK,Manufacturing Opticians, Philadelphia, Pa.
Send for ILLUSTRATED PRICED CATALOGUE.


J. STEVENS & CO.,

P. O. Box 28, Chicopee Falls, Mass.

Manufacturers of Stevens' Patent Breech-LoadingSporting and Hunters' Pet Rifles,Single and Double Barrel Shot Guns,Pocket Rifles, Pocket Shot Guns, GalleryRifles, Superior Spring Calipers and Dividers,including the New Patent Coil SpringCalipers: also Double Lip Countersinks andHathaways' Patent Combination Gauge.


Mill Stones and Corn Mills.

We make Burr Millstones, Portable Mills, Smut Machines,Packers, Mill Picks, Water Wheels, Pulleys, andGearing specially adapted to Flour Mills. Send forcatalogue.

J. T. NOYE & SONS, Buffalo, N. Y.


The fact that this shafting has 75 per cent. greaterstrength, a finer finish, and is truer to gauge, than anyother in use renders it undoubtedly the most economical.We are also the sole manufacturers of the CELEBRATEDCOLLINS' PAT. COUPLING, and furnish Pulleys, Hangers,etc., of the most approved styles. Price list mailed onapplication 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.


Leffel Water Wheels,

With recent improvements.
Prices Greatly Reduced.
8000 in successful operation.
FINE NEW PAMPHLET FOR 1879,
Sent free to those interested.

James Leffel & Co,
Springfield, O.
110 Liberty St., N. Y. City.


A PLANING MILL OUTFIT FOR SALE

very low for cash. Will sell all together or each machineseparate. All first-class machines, good order.

J. H. KERRICK & CO., Indianapolis, Ind.


BOGARDUS' PATENT UNIVERSAL ECCENTRIC MILLS—For grinding Bones, Ores, Sand, OldCrucibles, Fire Clay, Guanos, Oil Cake, Feed, Corn,Corn and Cob, Tobacco, Snuff, Sugar, Salts, Roots,Spices, Coffee, Cocoanut, Flaxseed, Asbestos, Micaetc., 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.


Printing Press

Print cards labels &c. (Self-inker $5) 13 larger sizes
For business or pleasure, young or old. Do your own
advertising and printing. Catalogue of presses, type,
cards, &c., for 2 stamps.
Kelsey & Co. Meriden, Conn.


Patents for the process of Dry Copying have been issued to us, dated May18 and June 1, 1880. The Hektograph is now the only gelatine copying padwhich can be used without infringing.All infringements will be prosecuted to the full extent of the law.

HEKTOGRAPH CO., 23 and 24 Church Street, New York.


THE TANITE CO.,

STROUDSBURG, PA.

EMERY WHEELS AND GRINDERS.

LONDON—9 St. Andrews St., Holborn Viaduct, E. C.

LIVERPOOL—42 The Temple, Dale St.



Metallic Shingles

Make the most DURABLE and ORNAMENTAL ROOFin the world. Send for descriptive circular and newprices to

IRON CLAD MANUFACTURING CO.,

22 CLIFF STREET, NEW YORK.


SHEPARD'S CELEBRATED

$50 Screw Cutting Foot Lathe.

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.


WANTED.—FIRST-CLASS PARTIES IN
cities to sell Wing's Fan Ventilators. A great success.Rare chance to make money. See Sci. Am., Jan. 31, 1880,or send for pamphlets, etc. L. J. WING, or The SimondsMfg. Co., 50 Cliff Street, New York.


CENTENNIAL AND PARIS MEDALS.

Mason's Friction Clutches and Elevators.

"New and Improved Patterns."
VOLNEY W. MASON & CO., Providence, R. I., U. S. A.



The Most Popular Scientific Paper in the World.

_______

VOLUME XLIII. NEW SERIES.

_______

Only $3.20 a Year, including postage. Weekly.
52 Numbers a Year.

_______

This widely circulated and splendidly illustratedpaper is published weekly. Every number contains sixteenpages of useful information, and a large number oforiginal 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 Readers find in The ScientificAmerican a popular resume of the best scientific informationof the day; and it is the aim of the publishersto present it in an attractive form, avoiding as much aspossible abstruse terms. To every intelligent mind,this journal affords a constant supply of instructivereading. It Is promotive of knowledge and progress inevery community where it circulates.

Terms of Subscription.—One copy of The ScientificAmerican will be sent for one year—52 numbers—postageprepaid, to any subscriber in the United Statesor Canada, on receipt of three dollars and twentycents by the publishers; six months, $1.60; threemonths, $1.00.

Clubs.—One extra copy of The Scientific Americanwill be supplied gratis for every club of five subscribersat $3.20 each; additional copies at same proportionaterate. Postage prepaid.

One copy of The Scientific American and one copyof The Scientific American Supplement will be sentfor one year, postage prepaid, to any subscriber in theUnited States or Canada, on receipt of seven dollars bythe publishers.

The safest way to remit is by Postal Order, Draft, orExpress. Money carefully placed inside of envelopes,securely sealed, and correctly addressed, seldom goesastray, but is at the sender's risk. Address all lettersand make all orders, drafts, etc., payable to

MUNN & CO.,

37 Park Row, New York.

To Foreign Subscribers.—Under the facilities ofthe Postal Union, the Scientific American is now sentby post direct from New York, with regularity, to subscribersin Great Britain, India, Australia, and all otherBritish 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, for Scientific American, 1 year; $9, gold, forboth Scientific American and Supplement for 1year. This includes postage, which we pay. Remit bypostal order or draft to order of Munn & Co, 37 ParkRow, New York.


THE "Scientific American" is printed with CHAS.ENEU JOHNSON & CO.'S INK. Tenth and LombardSts., Philadelphia, and 50 Gold St. New York.

Transcriber's Note:

Some archaic (Early American) spellings have been retained.

Obvious punctuation errors have been repaired.

The remaining corrections made are indicated by dotted lines under the corrections.
Scroll the mouse over the word and the original text will appear.

TRADE MARKS.:

Flour, B. R. Pegram, Jr. ... 7,727, 7,728

7,727, 7,728 are as printed.

Error

'pecularities' corrected to 'peculiarities'
"The distinctive peculiarities of this steamer are the very highsteam pressure that she carries— ..."
[A REMARKABLE LITTLE STEAMER.]

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