P. BLAISDELL & CO.

MANUFACTURERS of the "BLAISDELL" PATENT DRILL PRESSES, with quick

return motion, Agricultural Drills, Improved Engine Lathes, from 12

in. to 28 in. swing, Planers, Gear Cutters, Boring Mills, Hand Lathes,

and other first-class Machinists' Tools.

Jackson st., Worcester, Mass.

* * * * *

PATENT

BEDSTEAD FASTENING.

The BEST, CHEAPEST, and STRONGEST FASTENING ever invented.

Rights for States and Territories for sale. Address JOHN DOMINGOS and

BENJAMIN ESSIG, Sacramento, Cal.

* * * * *

Scientific American, Volume XXIV., No. 12, March 18, 1871 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures. · 第 152 / 194 题