Perspective and geometrical drawing adapted to the use of candidates for second and third-class teachers' certificates (1887)
McGuirl, Thomas H. [from old catalog] · Toronto, W. Briggs; · leaf 16
with CX, AB INTEODUCTION. 11 will be the horizontal range of the spectators vision. If wedescribe a circle from centre C, and distance CA or CB, suchcircle will be called the base of the cone of visual rays; for itwill be observed that from point X the spectator can see justas far as the edge of… … All representations of objects are supposed to be made on aplane (unlimited in extent), perpendicular to, and resting on,the ground plane, and directly in front of the spectator. Thisplane is called the Picture Plane^ and is written P. P. It must be distinctly borne in mind that the bottom of…
Geometrical drawing · Perspective
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