Practical engineering drawing and third angle projection, for students in scientific, technical and manual training schools and for ... draughtsmen ..
A drafting textbook by Frederick Newton Willson, self-published in Princeton, New Jersey in 1897 for engineering students and working draughtsmen. The plates are line-only geometric constructions — projections of cones and vaults, conic sections, tangent arcs — built from dotted construction lines, lettered points and hatched fills, useful as diagram vocabulary, technical ornament or ground for layered graphics.
