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 ...

IN his preface the author states that we nowadays expect to find somewhere in print an account of the little mysteries of any particular art, and that partly with the hope of enabling this expectation ...