Scientific American Volume 77 Number 07 (August 1897) . GATES ROCK &ORE BREAKER,Steam Ore Stamp,Mining Machinery, 50 yearB experience as builders. GATES IRON WORKS,Dept. C, 650 Elston Ave., Chicago, AMERICAN PATENTS. —AN INTER- enting and valuable table showing the number of patentsgranted tor the vaj-ious subjects upon which petitionshave been ai ed from the befiinninp down to December31. 1894. Contained in Scientific American Sup-plement, No. 100^2. Price 10 cents. Io be had atthis office and from all newsdealers. THE OBER LATHES

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