Haswell's engineers' and mechanics' pocket-book ..
A pocket reference of engineering rules and tables compiled by naval engineer Charles H. Haswell, published by Harper & Brothers in New York in 1844 for working engineers and mechanics. The figures are small line diagrams of circles, arcs, triangles and rectangles lettered with points and broken construction lines, useful as spare geometric marks, arc-and-chord motifs, and technical page furniture.
