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)

Parts