[Technical drawings (3) of 'optical compass']
- Made:
- circa 1888
- maker:
- Charles Vernon Boys
[Technical drawings (3) of 'optical compass' used by C.V. Boys in his recreation of the Cavendish experiment / C.V. Boys. ca.1888. 3 sheets, line drawings with wash; 2 bear ms. annotations; all 3 bear, in pencil, 'Opt. Compass'. No scale]
