Plain directions for obtaining photographic pictures : upon waxed and albumenised paper and glass, by collodion and albumen : including a third edition of Le Gray's Treatise on photography, a description of the stereoscope and the manner of taking pictures suited for it : also, the process for copying microscopic objects, &c.
A photography manual by Charles Heisch and Gustave Le Gray, published in London by T. Willats in 1852, giving practical directions for waxed paper, albumen, collodion and stereoscope work. The pictures are engraved diagrams of cameras, a stereoscope viewer and a stereoscope card holder, drawn in clean line with hatching and dashed guide lines that a designer could use as schematic line art of early optical equipment.
