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Title: Chapman Jones opacity balance for measuring comparative opac [Go to resource]
Description: Chapman Jones opacity balance for measuring comparative opacities of negatives, c. 1895. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Temporal: 1895 Source: Science Museum Creator: Chapman Jones (maker) Identifier: 1936-135 Go to resource More Like this...
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