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 130
imperative. It may benearpr the top or bottom, and still the perspective willbe accurate, so lono: as all the vanishinii; lines meet inthe one point. LETTERS IN PERSPECTIVE. 121 To ascertain the correct perspective of raised letters, itwill be necessary to have a point of distance on the… … We have sometimes seen writing in perspective thatappeared very effective a short distance off, but whenlooked into, has been found to be altogether wrong inprinciple. The perspective declination of the lettersthemselves has been correct enough, but the thicknesshas been added without any reference…
Embossing (Printing) · Signs and signboards, Glass
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