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Scientific American, Vol. 35, No. 18 (1876) (1876)
leaf 7
___. convex surface fits and is secured by an internal collar in the | tween the tongue, C, and the main part of B, is a long slit, trunk, G, the whole forming a universal compensating joint | D; and a screwstud, E, extends from the tongue out through which allows both the lateral play required by… … © 1876 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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