Stained glass work : a text-book for students and workers in glass
A stained glass text-book by Christopher Whall, published in New York by D. Appleton in 1905, written for students and working glass craftsmen. The pictures are plain black-and-white line drawings of tools and technique: a glazier's cutting or breaking tool, lead came cross-sections, and hands shown scoring and snapping glass. A designer could borrow their clean, schematic diagram style for technical illustration.
