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Description: | ROC (Maker's logo on the front of the instrument). EDRIDGE-GREEN COLOUR PERCEPTION LANTERN CERTIFIED LANTERN No. 3701 Model name and serial number on a metal plate on the front of the instrument). Hunterian Museum G.1986.135 (catalogue number typed on a self aghesive label, removed). MANU Rayner Optical Company Limited. circa 1935 ?Chesham, Buckinghamshire, England DES EDRIDGE-GREEN,Frederick,William,L, 1891 London, England. This is a Edridge-Green colour perception lantern used to determine diachroism and trichroism using several filters and diaphragms. The instrument has five discs each with eight diaphragms. The first disc has two closed diaphragms with six of various sizes in between. The last disc has various qualities of glass, clear, ground, ribbed and neutral. The other three intervening discs have various gel filters in red, yellow, green, blue and purple.
The lamp is a gas-filled, general service lamp with a single coil wreath, tungsten filament from about 1935-40. It appears to be little used and is contemporay with the instrument. | License: | http://www.hmag.gla.ac.uk/spirit/rights/ | Publisher: | Hunterian Museum and Art Gallery, University of Glasgow | Rights holder: | Hunterian Museum and Art Gallery, University of Glasgow | Subjects: | SCIENTIFIC COLLECTION : | Source: | Hunterian Museum | Creator: | Hunterian Museum and Art Gallery, University of Glasgow | Identifier: | http://www.huntsearch.gla.ac.uk/cgi-bin/... | Language: | en-GB | Go to resource |
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