OHN H. CHEEVER, Treas.

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THE SEVENTH
CINCINNATI
INDUSTRIAL
EXPOSITION

Opens for the reception of goods AUGUST 20TH.

Opens to the public SEPTEMBER 10TH, and continues open until OCTOBER
11TH, in the

NEW PERMANENT BUILDINGS
ERECTED FOR THE PURPOSE.

Machinery Tested and Fully Reported upon.

Send for Rules and Premium Lists after April 1.

H. McCOLLUM, Sec'y.

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[Illustration: Amalgamating.]

THE FORSTER-FIRMIN
GOLD AND SILVER
AMALGAMATING COMP'Y

of Norristown, Pa., will grant state rights or licenses or easy terms.
This system works up to assay, and recovers the mercury rapidly.

Apply as above.

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THOMAS'S CONCENTRATED DYE
Stuffs. (138 Recipes SENT GRATIS.) (See SCIENTIFIC AMERICAN
SUPPLEMENT, March 15, '79.) Address

N. SPENCER THOMAS, Elmira, N. Y.

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[Illustration: Rotary Pressure Blower.]

BAKER ROTARY PRESSURE BLOWER.
(FORCED BLAST)

Warranted superior to any other.

WILBRAHAM BROS.
2318 Frankford Ave.
PHILADELPHIA

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"THE 1876 INJECTOR."

Simple, Durable, and Reliable. Requires no special valves. Send for
illustrated circular.

WM. SELLERS & CO., Phila.

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[Illustration: Cold Rolled Shafting.]

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
the CELEBRATED 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, Pittsburgh, Pa.
190 S. Canal Street, Chicago, Ill., and Milwaukee. Wis.

[Right index] 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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VEGETABLE AND FLOWER SEEDS

WE SELL EVERYTHING FOR THE GARDEN

Descriptive Catalogues of 175 pages sent Free

PETER HENDERSON & CO.
_35 Cortlandt St., New York._
FLOWER AND FRUIT PLANTS

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[Illustration: Engraving.]

L. SMITH HOBART, President. JOHN C. MOSS, Superi