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Title: five small screws, 7mm long, sherardized by Cowper Coles, 19 [Go to resource]
Description: five small screws, 7mm long, sherardized by Cowper Coles, 1920s, using a mixture of pumice and zinc dust, plus 1% resin. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: Five sherardized screws. Temporal: 1920s Source: Science Museum Creator: Cowper Coles, Sherard Identifier: 2002-158 Go to resource More Like this...
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