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Description: | Black bulb thermometer. Mercury, large black bulb, graduated 0-180 deg F. With an index and magnet in wooden box. On the box are labels reading "203" and "Humphrey's Black Bulb Thermometer". This may refer to George Humphreys, an assistant at the Royal Observatory, Greenwich, between 1846 and 1848. Used to measure sun radiation in a vacuum.00
AUDIT - two unnumbered parts. The black-bulb thermometer is used to measure radiation - either short-wave Solar radiation or long-wave Earth radiation.
caption: Record Shot - Do not reproduce. | Publisher: | "http://collections.rmg.co.uk/" | Rights holder: | "Royal Museums Greenwich" | Subjects: | thermometers | Source: | Royal Museums Greenwich | Identifier: | http://collections.rmg.co.uk/collections... | Go to resource |
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