Beam compass

Beam compass, tubular, divided on silver to 1/20th inch; reads by vernier to 1/1000th inch; clamp and slow motion; numbered to 45 on brass; extension tube numbered from 46 to 65, divided as above

Details

Category:: Mathematics

Object Number:: 1876-606

type:: compasses (drawing instruments) and beam compasses

credit:: British Admiralty (Hydrographic Department)

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