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 ...
This polished wooden case is lined with green satin and velvet and is fastened with two brass hooks. It holds ten brass and steel drawing instruments and attachments: 1) A 5-3/4" pair of dividers with ...
Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results