Working drawings and how to make and use them
A manual of mechanical and descriptive geometry drawing by engineer Lewis M. Haupt, published in Philadelphia by J. N. Stoddard & Co. in 1881 for students and draftsmen. The plates are numbered line diagrams of projection planes, folded ground lines and torn-edge paper sheets, lettered with points and dashed construction lines, offering ready-made technical linework and axonometric scaffolds.
