A dictionary of arts and sciences (Volume 3)
George Gregory's multi-volume encyclopedia of arts and sciences, issued in Philadelphia by Isaac Peirce in 1815 for general and professional readers. The plates are wood-engraved technical diagrams — mill gearing, pumps, escapements, balance beams — built from ruled hatching and lettered reference keys, useful for mechanical line motifs, engraved shading textures, and labelled cutaway schematics.
