Inside Out Library · ExploreNotes on mechanical drawing (1922)Wallis, Rolland S. [from old catalog], Iowa state college of agriculture and mechanic arts, Ames. Dept. of engineering extension. [from old catalog] · Ames, Iowa, Engineering extension department, Iowa state college · leaf 47VULCANITE WOOD Fig. 58.—Cross hatching symbols. mm. 77777, ^tttM … Fig. 59.—A half-section.Mechanical drawingInternet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.More pictures from Notes on mechanical drawingMore like this
