Two washers
- Made:
- 15/7/27
- maker:
- Sherard Osborn Cowper-Coles
This image is released under a CC BY-NC-SA 4.0
Licence
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LicenseTwo washers, 25mm outer diameter and 12mm inner diameter
Science Museum Group
© The Board of Trustees of the Science Museum
Two washers, 25mm outer diameter and 12mm inner diameter, and a piece of aluminium sherardized by Cowper Coles in 1929 with a mixture of 50% Zn, 50% mica dust, 1% napthalene.
Details
- Category:
- Metallurgy
- Object Number:
- 2002-140
- Materials:
- steel (metal), aluminium (metal) and zinc (metal)
- Measurements:
-
: x .9843 in.; x 25 mm
- credit:
- Mr. Peter Cowper-Coles.
