Sign writing and glass embossing : a complete practical illustrated manual of the art, to which are added numerous alphabets (1890)
Callingham, James · Philadelphia : H. C. Baird & co. · leaf 131
knowledge of the sub-ject. The thickness and shadow must be treated accordingto the rules of perspective. The next example (Fig.41) gives a perspective representation, not merely as re-gards outline, but also as regards the light and shade,the principle shown in Fig. 34, page 110, coming intoplay.… … We have pointed out the different principles uponwhich a correct perspective representation is based, andthis example is afforded to show how these rules are ap-plicable to a finished production. The letters are not infstrict perspective, or they would vanish off in widthmuch more rapidly than they…
Embossing (Printing) · Signs and signboards, Glass
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