Fearnley's patent Universal calculator

Fearnley's patent Universal calculator, circular slide rule with cardboard scale in fitted mahogany case, unsigned, British,1880-1900. Used at the University Observatory, Cambridge, at Madingley Road, Cambridge, England.

Details

Category:: Mathematics

Object Number:: 1948-82

Materials:: cardboard, mahogany (wood), paper (fibre product), brass (copper, zinc alloy), steel (metal) and tin plated

Measurements:: overall: 35 mm x 415 mm x 430 mm,

type:: circular slide rule

credit:: Solar Physics Observatory, Cambridge

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