Warren, Samuel Edward, 1831-1909. [from old catalog] · New York, J. Wiley & sons · leaf 54
ints of tangency, Band F, with the lower base, are where their elements of contact—the elements of shade—pierce the horizontal plane. Hence Bw—BV, and Ff—Ff, are the required elements of shade; oneprojection of each being visible. Third.—To construct the elements of shade on a cylinder whoseaxis is… … N. IV
Shades and shadows
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
