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Description: | Marcet's steam apparatus. Spherical pressure chamber in brass. Consists of two halves joined together with 16 screws. Top half has three access ports to internal chamber sealed with metal screws with octagonal heads. Port on top is larger than other two on sides. Engraved 'Watkins and Hill Charing Cross London'. Lower half is painted black, and upper half is varnished. Professor William Knight purchased "Marcet's steam apparatus" in 1824/25 from the supplier Al Garden in London for £4/16/9 + 1/9 in freight4. The device was invented by Francois Marcet to measure the vapour pressure of water under high pressure. The full appartus has a high temperature thermometer screwed into it. | License: | http://www.abdn.ac.uk/historic/Copyright_terms_conditions.shtml | Publisher: | ABDNP University of Aberdeen, Natural Philosophy Collection of Historical Scientific Instruments | Rights holder: | 47718 | Temporal: | 1824-1825 | Source: | University of Aberdeen | Creator: | Watkins and Hill | Identifier: | http://calms.abdn.ac.uk/Geology/dserve.e... | Go to resource |
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