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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 piece of aluminium, 25mm long and 6mm wide, sherardized by Cowper Coles on 15/7/27 using a mixture of 50% Zn, 50% pumice, 1% napthalene.
Details
- Category:
- Metallurgy
- Object Number:
- 2002-142
- Materials:
- steel (metal), aluminium (metal) and zinc (metal)
- Measurements:
-
: x .9843 in.; x 25 mm
- credit:
- Mr. Peter Cowper-Coles.
