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Title: Circular protractor, 1765-1770 [Go to resource]
Description: Six inch circular protractor by John Troughton, in mahogany case, c.1785 License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: circular protractor
drawing instrumentTemporal: 1765-1770 Source: Science Museum Creator: Troughton, John Identifier: 1918-122 Go to resource More Like this...
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