Mechanical drawing for secondary schools
A 1916 mechanical drawing textbook by Fred D. Crawshaw and James D. Phillips, published by Scott, Foresman in Chicago and New York for high school and manual-training students. The plates are line drawings of machine parts and wood joints in orthographic and isometric projection, with dimension lines, arrowheads, hatched sections and hand-lettered fractions usable as technical ornament or diagram vocabulary.
