Case for circular slide rule
Case for circular slide rule, by Alfred Apps, London
- Object Number:
- 1911-199 Pt1
- type:
- instrument case
- Image ©
- The Board of Trustees of the Science Museum
Circular slide rule, c 1870.
- maker:
- Alfred Apps Alfred Apps
This image is released under a CC BY-NC-SA 4.0
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Science Museum Group Collection
© The Board of Trustees of the Science Museum
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
Parts
Circular slide rule
Circular slide rule, by Alfred Apps, London.
- Measurements:
-
overall: 3 mm 92 mm, 0.162 kg
- Materials:
- brass (copper, zinc alloy) and silver (metal)
- Object Number:
- 1911-199 Pt2
- type:
- circular slide rule
- Image ©
- The Board of Trustees of the Science Museum
