Perspective and geometrical drawing : adapted to the use of candidates for second and third-class teachers' certificates (1887)
McGuirl, Thos. H. (Thomas H.) · Toronto, Ont. : W. Briggs · leaf 16
ould appear to vanish at the same point directly in front ofus, hence the rule : Lines parallel to the line of direction viU vanish at thecentre of vision. (Fig. 3.) Thus, let C be centre of vision, and AA, BB the ends ofparallel lines : they will all meet at C, and all the lines drawnfrom C to AB… … Parallel Urns drawn between vanishing lines are of equallength, and, conversely, the lines joining the extremities ofequal parallel lines will vanish to a point. HL HL ~~ f V T n A BL 0 Again, if the spectator stood on the grqnnd at 0, where thepicture plane rests, and looked towards C on the…
Geometrical drawing · Perspective
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![An illustration from Divina proportione : opera a tutti glingegni perspicaci e curiosi necessaria oue ciascun studioso di philosophia: prospettiua pictura sculptura: architectura: musica: e altre mathematice: suavissima: sotile: e admirabile doctrina consequira: e delecterassi: co[n] varie questione de secretissima scientia (1509)](https://img.insideoutlibrary.com/img/200/ia-divinaproportion00paci-86-130.webp)