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 56
Fig. 58 … 59, that the thumb nail may be used as a sliding gauge. With itmeasure the length of the back of the book on its upper nearedge and compare its length with the vertical distance from thisedge to where the strings join (C in Fig. 59). (In this case ittakes one and one fourth of the book length to…
Drawing
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