Circular protractor by Edward Troughton

Made:: London

maker:: Edward Troughton

Circular protractor by Edward Troughton, London, 9 inch with folding arms, divided on silver to 1/3 degree reading by vernier to 1-inch, engraved "Troughton, London" & "F^O 40", in case

Details

Category:: Mathematics

Object Number:: 1876-513

type:: drawing instruments and folding arm protractors

credit:: British Admiralty (Hydrographic Department)

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Parts

Mahogany case, for circular 9-inch protractor

Mahogany case for circular 9-inch protractor by Edward Troughton, London

Materials:: complete , mahogany (wood) , brass (copper, zinc alloy) and paper (fibre product)

Object Number:: 1876-513 Pt1

type:: instrument case

Circular protractor by Edward Troughton

Circular protractor by Edward Troughton, London, 9 inch with folding arms, divided on silver to 1/3 degree reading by vernier to 1-inch, engraved "Troughton, London" & "F^O 40"