A text book of geometrical drawing, for the use of mechanics and schools, in which the definitions and rules of geometry are familiarly explained (1849)
heends could also be seen, and the more the pencil is inclined thesmaller will be the angle subtended by its side, until nothing but theend would be visible. Again if a tcheel be placed perpendicular-ly opposite the eye, its rim and hub would shew perfect circles,and the spokes would all appear to… … D ei^ A /u/. :j. T W ^^ F7Mte 43. PERSPECTIVE Fig.l. F - V ^ ^^^^^^^ ^^^::^^-^ ^^ ^Ap. / E ^-^^^^^ ^ .^-^^^X^ B /V^ G Az//. .^. D s 1) -,-- Ji, ■■i M \^- -■. r - -■^r- - A
