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 113
IV) is drawn,look at the model fromthe front (Fig. 158), andnote that the outer sur-face of the ring touchesthe square frame at fourpoint^only — where thediameters of the squarecross it (A, B, C, and D).These diameters, beingparallel respectively tothe sides of the square,are represented in…
Drawing
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