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Title: Rectangular protractor, artillery pattern, attributed to J.H [Go to resource]
Description: Rectangular protractor, artillery pattern, attributed to J.H. Steward, London License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: combined scale protractors
drawing instrumentsSource: Science Museum Creator: J.H. Steward Identifier: 1986-591 Go to resource More Like this...
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