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Description: | Negretti & Zambra's Opticians to her Majesty London 10475 (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 -25-190 . DES after FAHRENHEIT,Gabriel,Daniel. 1714 ? Europe. MANU Negretti & Zambra circa 1870 Holborn Viaduct, London, England. This instrument was used for measuring solar radiation. The thermometer is encased in an evacuated glass envelope and is held in place by blued brass clips. The vacuum prevents any heat loss by the mercury column. Since the bulb and first inch or so of the capillary are painted it is not possible to determine if the capillary is restricted but the instrument is probably a maximum thermometer | 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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