Mechanics, or, The doctrine of motion ..
William Emerson's Mechanics, or, The Doctrine of Motion, a mathematical treatise on forces and machines printed for J. Nourse in London in 1769 for students and practitioners of natural philosophy. The plates are engraved sheets of numbered geometry figures — circles with chords and tangents, lettered construction points, cones and a projection box in fine line hatching — usable as line-art diagram ornament, endpapers, or technical pattern.
