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Description: Slide case, containing apertometer by Wray, and some papers concerned with apertometers, English, late 19th century License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: apertometer Temporal: 1900-1920 Source: Science Museum Creator: Wray Optical Works Ltd. (maker) Identifier: A159417 Go to resource More Like this...
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