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Description: | R.R. B EARD LTD R. R. B. L ONDON S.E.15. (printed on a blue paper label) VOLTS 300 {ohms} MADE IN 67822/5 ENGLAND 0.75 AMPS (plate on the end of the instrumemt) MANU R.R. Beard Ltd. circa 1950 London, S.15, England. This is a rheostat used for controlling the voltage from a 250 volt step down transformer with seven taps. The 6th tap, the one in use, giving 6 volts was used to power a McCartney microscope lamp. The rheostat used in series acted as a dimmer switch. | 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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