Notes on technical sketching and free hand lettering for engineering students
A 1912 self-published manual on technical sketching and freehand lettering by Alton Lincoln Smith, issued in Worcester, Massachusetts, for engineering students. The plates are line diagrams of machine parts in plan and section, with hatched cut surfaces, centre lines, and dimension arrows keyed to single letters; useful for hatch textures, arrow and extension-line conventions, and stock lettering alphabets.
