COLUMBIA BICYCLE.

A practical road machine. Indorsed

by the medical profession as the most

healthful of outdoor sports. Send 3

cent stamp for 24 page catalogue, with

price list and full information, or 10

cents for catalogue and copy of _The

Bicycling World_.

THE POPE M'F'G CO.,

89 Summer Street, Boston, Mass.

MACHINISTS' TOOLS.

NEW AND IMPROVED PATTERNS.

Send for new illustrated catalogue.

Lathes, Planers, Drills, &c,

NEW HAVEN MANUFACTURING CO.,

New Haven, Conn.

H. W. JOHNS'

ASBESTOS

LIQUID PAINTS, ROOFING, BOILER COVERINGS,

Steam Packing, Sheathings, Fireproof Coatings, Cements,

SEND FOR SAMPLES, ILLUSTRATED PAMPHLET, AND PRICE LIST.

H. W. JOHNS M'F'G CO., 87 MAIDEN LANE, N. Y.

THE GEORGE PLACE MACHINERY AGENCY

Machinery of Every Description

121 Chambers and 103 Reade Streets, New York.

THE WATSON PUMP, FOR ARTESIAN, OR DEEPWELL PUMPING,

PISTON ROD, PLUNGER & WELL ROD IN DIRECT LINE MACHINE

SIMPLE, EFFICIENT.

JAMES WATSON, 1508 S. FRONT ST., PHILA.

DIES FOR EVERY PURPOSE.

STILES & PARKER PRESS CO., Middletown, Ct.

BI-SULPHIDE OF CARBON.

E. R. TAYLOR,

Cleveland, O.

ICE-HOUSE AND REFRIGERATOR.--

Directions and Dimensions for construction, with one

illustration of cold house for preserving fruit from

season to season. The air is kept dry and pure throughout

the year at a temperature of 34 deg. to 36 deg.. Contained

in SCIENTIFIC AMERICAN SUPPLEMENT, 116. Price 10 cents.

To be had at this office and of all newsdealers.

BEECHER & PECK,

Successors of MILO PECK, Manufacturers of

PECK'S PATENT DROP PRESS,

Regular sizes. Hammer

from 50 to 2,570 Lb. Special

attention given to making

of Drop Dies, Drop and Machine

Forgings.

New Haven, Conn.

[ILLUSTRATION]

[ILLUSTRATION]

17--STOP ORGANS

Sub-bass and Oct. Coupler, box'd and ship'd only $97.75.

New Pianos, $195 to $1,600. Before you buy an

instrument be sure to see my Mid-summer offer, illustrated,

free. Address Daniel F. Beatty, Washington, N. J.

Scientific American, Vol. XLIII.—No. 1. [New Series.], July 3, 1880 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures · 第 129 / 157 题