ical Instruments, 186 pp.; Part 3,
Magic Lanterns, 112 pp.; Part 4, Philosophical and Chemical Apparatus,
160 pp. JAMES W. QUEEN & CO. 924 Chestnut St., Philadelphia, Pa.

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"RELIABLE"

Engines a complete success. Prices still 40 per cent. below those of
other makers. Unequaled for efficiency, simplicity, and durability.
Prices from $250 for 10 H. P., to $400 for 30 H. P. All complete, with
Governor, Pump, and Heater. Address, for circular,

HEALD, SISCO & CO., Baldwinsville, N. Y.

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UNIVERSAL GRINDER.

These Grinders consist of a series of disks with beveled edges locked
together on a shaft. They revolve towards each other at different rates
of speed. They combine strength and durability. No friction; hence no
heat. They will grind all kinds of Grain, also Quartz Rocks, Ores,
Gypsum, Brimstone Shavings, Shells, Brick Clay, Cork, Rubber, Bone, Oil
Cake, Flax Seed, Cotton Seed, and any number of articles in use by
manufacturers and farmers. These Grinders are disposed of on reasonable
terms. Send for Illustrated Catalogue with terms. NEWELL & CHAPIN, foot
of West 19th Street, New York.

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[Illustration]

23 Sizes of Direct, 24 Sizes of Boilers, and the best Indirect
Radiation.

Send for circulars.

EUREKA STEAM HEATING CO. ROCHESTER, N. Y.

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OTIS' SAFETY HOISTING Machinery.

OTIS BROS. & CO., No. 348 Broadway, New York.

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JOHN R. WHITLEY & CO.

European Representatives of American Houses, with First-class Agents in
the principal industrial and agricultural centers and cities in Europe.
London, 7 Poultry, E. C. Paris. 8 Place Vendeme. Terms on application.
J. R. W. & Co. purchase Paris goods on commission at shippers'
discounts.

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ROOTS' NEW IRON BLOWER.

[Illustration]

POSITIVE BLAST. IRON REVOLVERS, PERFECTLY BALANCED IS SIMPLER, AND HAS
FEWER PARTS THAN ANY OTHER BLOWER.

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.

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PROPOSALS FOR MAIL LOCKS.

POST OFFICE DEPARTMENT, WAS