San Francisco : Architect and Engineer, Inc · leaf 252
s, ceramic whiteware, thermo-setting plastics, hardrubber, alminum and its alloys,nickel, copper, zinc, iron alloys and cast iron. Copies of the book-let, which is entitled, PorcelainEnamel, the Lifetime Finish, maybe obtained by writing The Ameri-can Rolling Mill Co., Middletown,Ohio. THREE-POINT… … Convenient pocket-size gagefor pipe measurement. patents are pending in the U. S.,consists of two pivoted steel plateswith edges curved at three pointsfor contact with the pipe to bemeasured, together with scalewhich automatically registers notonly the pipe size in terms of insidediameter but the…
Architecture · Building
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