1) A 4" brass semicircular protractor, divided to single degrees and numbered by tens in both directions from 10 to 180. It is marked: Butterfield AParis. 2) A 6-3/4" brass folding combination set ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. The instruments in the cardboard box ...

Who could imagine you could draw musical instruments on normal paper with any pencil and then play them with your finger? It is an electronic pencil that lets you make music while you draw. Their ...

Instruments like these were used by skilled draughtsmen (and women) in many drawing offices to produce engineering drawings for structures, such as bridges and building frames, at a time when computer ...