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Scientific American, Vol. 60, No. 23 (1889) (1889)
leaf 3
alves are operated in one direction by the main upon the upper surface of which its lug has a positive piston coming in contact with their stems, and are bearing. The further the upper arm is carried down- moved by the pressure of steam on their backs in an ward, the tighter the lower arm binds… … troscope are supported on a little rod of quartz % in. BACKER’S GUIDE FOR BAND-SAWS. © 1889 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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