FORSTER'S ROCK & ORE BREAKER AND COMBINED CRUSHER AND PULVERIZER.
[Illustration]
_The simplest machine ever devised for the purpose._
Parties who have used it constantly for six years testify that it
will do _double_ the work of _any other Crusher_, with one-third
the Power, and one-half the expense for keeping in repair.
The smaller sizes can be run with Horse Power.
Address TOTTEN & CO., Pittsburgh Pa.
Scientific American, Vol. XLIII.—No. 1. [New Series.], July 3, 1880 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures · 第 122 / 157 题