Appleton's cyclopædia of drawing, designed as a textbook for the mechanic, architect, engineer, and surveyor (1866)
Worthen, William Ezra, 1819-1897, [from old catalog] ed, Appleton, firm, publishers, New York. (1866. D. Appleton & co.) [from old catalog] · New York, D. Appleton and company · leaf 163
en the force is applied on alternate sides of A B. If a beam be subjected to a transverse strain, one side is compressed,while the other side is extended ; and therefore, where extension terminates 126 MECHANICS. and compression begins, there is a lamina or surface wMcli is neither ex-tended nor… … Fig. 219. Fig. 220. Fig. 221. at the outer surface. Acting on these principles, Mr. Hodgkinson hasdetermined the most economical form for cast-iron beams or girders, ofwhich the section is given (fig. 222); it has been found, that the strengthof cast-iron to resist compression is about six times…
