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Description: | 50V (white paint on the glass envelope). f0 (written in back on the base of the envelope) MANU Unsigned. circa 1895 DES after SWAN,Joseph,Wilson,Sir. 1878 Newcastle-Upon-Tyne England DES after EDISON,Thomas,Alva. 1879 Menlo Park, New Jersey United States of America This is a 50 volt ?32 candle power lamp with a standard ES Edison screw cap type No E27/25 and a clear pear shaped envelope. The single round section does not appear to be a squirted filament having a less reflective surface. The filament also does not have pits caused by impurities, however, it is not as regular as a metalised filament. The filament is in the form of a single loop which is attached to the platinum lead in wires by the deposited carbon method via nickel supports with twisted ends. The lead in wires pass through a short cane or stem. The envelope is a hand made vacuum type with pintel or pip. | 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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