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Title: Ivory slide rule [Go to resource]
Description: Calculating rule, single fold, ivory, English, c. 1870, owned by S. Morley License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: slide rule Temporal: 1865-1875 Source: Science Museum Identifier: 1990-7667 Go to resource More Like this...
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