How to paint permanent pictures
A 1922 New York technical manual by chemist Maximilian Toch, published by D. Van Nostrand, explaining how painters can make lasting pictures through sound pigments and materials. The first picture is a classical figure in a toga holding a tilted tablet or panel, a plain line-engraved image suited to studies of antique draped figures. The second is a small circular emblem of an open book crossed by a pen and a flame-like tool, which suggests a compact mark or seal device for a technical text.
