Folding-arm brass protractor by Troughton & Simms

Made:: 1840-1860 in London

maker:: Troughton and Simms Limited

Folding-arm brass protractor by Troughton & Simms, London, in wooden case, mid 19th century.

Details

Category:: Mathematics

Object Number:: 1970-353

Materials:: brass (copper, zinc alloy) and wood (unidentified)

type:: drawing instruments and folding arm protractors

credit:: Natural History Museum.

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