Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 159
e of the solid. Frequently, in practice, the form of the 142 ORTHOGRAPHIC PROJECTION. surface of a solid is found by applying paper or thin sheet-brass directly to thesolid and cutting it to fit. To develop the surface of a cylinder formed by the intersection of anotherequal cylinder^ as the knee… … into any number of equal parts,eight for instance; through thesepoints, 1, 2, 3, etc., draw linesparallel to the side A C of the pipe,and cutting the line C D of the in-tersection of the two cylinders.Lay off A B equal to the semicir-cle A 4 B, and divided into thesame number of equal parts;through…
Mechanical drawing
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