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Title: [Go to resource]
Description: Two lens doublets in drawtube inside another tube, part of erector for a telescope, English, 19th century License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: instrument component
telescope - refractingTemporal: 1801-1900 Source: Science Museum Identifier: A199009 Go to resource More Like this...
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