Freehand perspective and sketching; principles and methods of expression in the pictorial representation of common objects, interiors, buildings and landscapes (1910)
Norton, Dora Miriam · Brooklyn : D. M. Norton · leaf 110
the long diameters of itsellipses unmistakably appear at rightangles to each other. To understand how this can bethe case,hold the cylinder again at the eye level, as in Fig. 151, and with a pencil mark on it the points (A and B) where the side boundaries meet the ends of the ellipse. Lower the… … AiUiUJJiiluIuIil Fig. 149 nmn
Drawing
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