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 496
are at once foundby drawing two tangents to its base, parallel to the ray of light, and pro-jecting tlirough the points of contact lines parallel to the axis of thecylinder. Draw tlie tangents D d and C^ c parallel to the ray E; these are theoutlines of tlic shadow cast upon the horizontal plane.… … Fig. 3. Fi- 4. |!:;:::;iii:ii,ii;iiiiiii;iiiiiyiy;::!;iiii!;n J B R^ m It^Mi ^m ii ^ iliii l!l!lll!!!l!!!l!!!!! —yrt:—r /nfiMirinfifiiiiriiiTiTiririiiifii ifiriiiiiiii.