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Description: | Negretti & Zambra'London 282773 (engraved on the body of the thermometer and picked out in black). There is also an NZ monograph. The scale is engraved over white and is picked out in black and reads in 1 degree divisions marked at 10 degree intervals from 30-150 DES after FAHRENHEIT,Gabriel,Daniel. 1714 ? Europe. MANU Negretti & Zambra second half 19th century Holborn Viaduct, London, England. Discovered in the miscellany when the material was transferred from Physics and Astronomy in 1992. The instrument works as a maximum thermometer by having a constriction in the bore of the capillary just below the scale approximately 53mm above the bulb which is of the spherical type. When mercury rises up the capillary and registers a temperature the moment that temperature falls the mercury column breaks due to the surface tension exerted at the top of the column being greater than that in the choke. The bulb is round. On loan to the Physics and Astronomy Department EXIT NUMBER 2092 it is object 21 in display case A Kelvin & 'the New Professors ', in room 470, The Kelvin Building, Department of Physics and Astronomy Glasgow University. | 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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