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Title: Circular slide rule, brass, 5" diameter, in case, made by Ha [Go to resource]
Description: Circular slide rule, brass, 5" diameter, in case, made by Haas and Hurter, of London License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: circular slide rule Source: Science Museum Creator: Haas and Hurter Identifier: 1905-112 Go to resource More Like this...
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