BLAKE'S STONE AND ORE BREAKER AND CRUSHER.
For breaking hard and brittle substances to any size. Endorsed by the
leading MINING, MANUFACTURING, and RAILROAD corporations in the UNITED
STATES and FOREIGN COUNTRIES. FIRST PREMIUM wherever exhibited, and
hundreds of testimonials of the _highest character_.
Scientific American, Volume 40, No. 13, March 29, 1879 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures · 第 114 / 162 题