ADVERTISEMENTS.

INSIDE PAGE, EACH INSERTION - - - 75 CENTS A LINE.

BACK PAGE, EACH INSERTION - - - $1.00 A LINE.

(About eight words to a line.)

_Engravings may head advertisements at the same rate

per line, by measurement, as the letter press. Advertisements

must be received at publication office as early

as Thursday morning to appear in next issue._

-->The publishers of this paper guarantee to advertisers

a circulation of not less than 50,000 copies every

weekly issue.

FOR SALE.--PLYMOUTH MACHINE

Works, Engine, and Saw Mill. Patterns on hand. Locality

good. For particulars, call on or address the works.

Plymouth Machine Works, Plymouth, Richland Co., O.

FIRE BRICK, TILE AND CLAY RETORTS ALL SHAPES

BORGNER & O'BRIEN

23rd ST, ABOVE RACE, PHILADELPHIA.

Scientific American, Vol. XLIII.—No. 1. [New Series.], July 3, 1880 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures · 第 130 / 157 题