Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 353
rned over and the cast iron,converted into steel, is poured into moulds. 1426. LENS-GRINDING MACHINE. —Thebell-crank arm a is made adjustable in the verticalshaft, and is pivoted for a free motion in the grind-ing cup d, to give a variety of motions to the cupover the lens; or the operation may be… … MILL AND FACTORY APPLIANCES. 343
Mechanical movements
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
