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Title: George W. Richardson's Direct Reading Slide Rule, made in Ch [Go to resource]
Description: George W. Richardson's Direct Reading Slide Rule, made in Chicago, with instruction booklet, copyright 1909, in cardboard box License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: slide rules Temporal: 1909-1916 Source: Science Museum Creator: Richardson, George W. Identifier: 1990-751 Go to resource More Like this...
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