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Title: Bellows' concentric ready reckoners [Go to resource]
Description: Bellows' concentric ready reckoner calculators for conversion of the Metric System to British Imperial weights and measures License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: ready reckoners (weights and measures) Temporal: 1878-1900 Source: Science Museum Creator: Silverlock, H. Identifier: http://collectionsonline.nmsi.ac.uk/grab... Go to resource More Like this...
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