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 600
erstandthat, if in the place of a line a plane or rig. i. curved surface is substituted, the result will be a cone of rays. Let A B (fig. 2) bea straight line, and letthe globe of the eye berepresented by a cir-cle, and its pupil bythe point C. The rayemanating from A, en-tering through C,… … Fiff. 2. «3-S6 PERSPECTIYE DRAWING. eye in a curved line a 3 I. Conceive the line AB moved to a greaterdistance from tlie eye, and placed at A^ B, then the optic angle will bereduced, and the image a 3 V will be less than before; and as our visualsensations are in proportion to the magnitude of the…
