WATER METERS. OIL METERS.

=Prices largely Reduced.=

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[Illustration: WATSONS NON CHANGEABLE GAP LATHE HAS GREAT

FACILITIES FOR LARGE OR MEDIUM SIZE WORK JAMES WATSON MANR. 1608

S. FRONT ST. PHILA. PA.]

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HARTFORD

STEAM BOILER

Inspection & Insurance

COMPANY.

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

J. B. PIERCE, Sec'y.

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[Illustration]

=Patent Portable Chuck Jaws.=

Improved Solid Emery Wheels, for grinding Iron and Brass Castings,

Tools, etc. Manufactured by AM. TWIST DRILL CO., Woonsocket, R. I.

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=$7= A DAY to Agents canvassing for the =Fireside Visitor=. Terms and

Outfit Free. Address P. O. VICKERY, Augusta, Maine.

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=HAND SAW MILL= SAVES THREE MEN'S labor.

S. C. HILLS, 78 Chambers St., N. Y.

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=BEST=

Scientific American, Vol. XXXIX.—No. 6. [New Series.], August 10, 1878 · 第 37 / 40 题