Notes on technical sketching and free hand lettering for engineering students
A 1909 instructional manual on technical sketching and freehand lettering by Alton Lincoln Smith, published in Worcester, Massachusetts, for engineering students learning to draw machine parts by hand. The plates hold line drawings of cylinders, chains, flanges, rocker arms and pulleys, sectioned and hatched, with dimension lines, arrowheads and letter keys, plus alphabets of engineering lettering — useful for hatch patterns, measurement callouts and hand-drawn mechanical forms.
