Circular slide rule, c 1870.

Made:
1870-1875 in London
maker:
Alfred Apps
Alfred Apps
Circular slide rule, c 1870. (circular slide rule)

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Engineer's circular slide rule, by Alfred Apps, London, with case, c.1870.

A circular engineer's slide rule made by Apps, c.1870. A circular slide rule affords a long and therefore accurate logarithmic line in a small amount of space. The potential of circular rules was not really utilized until the Victorian period, when several spiral and helical designs appeared on the market.

Details

Category:
Mathematics
Object Number:
1911-199
type:
circular slide rule
credit:
Thomas H. Court

Parts

Case for circular slide rule

Case for circular slide rule

Case for circular slide rule, by Alfred Apps, London

Object Number:
1911-199 Pt1
type:
instrument case