A manual of drawing
A mechanical drawing manual by Clarence Edwin Coolidge, published in New York by J. Wiley & Sons in 1902 for engineering students and draftsmen. Plates pair freehand sketches with finished ink drawings: sectioned gear teeth and belt pulleys, dimension lines and arrowheads, hatched cross-sections, springs, and linkage diagrams, offering line hatching patterns and drafting notation for technical or diagrammatic layouts.
