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Title: Two washers, 25mm outer diameter and 12mm inner diameter, a [Go to resource]
Description: 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. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: Sherardized washers plus piece of Aluminium. Temporal: 15/07/2027 Source: Science Museum Creator: Cowper Coles, Sherard Identifier: 2002-140 Go to resource More Like this...
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