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Description: Condenser with iris diaphragm, on retort stand, suitable for optical bench work, but no guides for stand, Continental, late 19th or early 20th century License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: microscope condensers Temporal: 1851-1930 Source: Science Museum Identifier: A196543 Go to resource More Like this...
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