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Description: | Black cylindrical bakelite HF tester with control switch to front; warning label attached to back of device; Edward High Vacuum Ltd; model no TI250; with mains plug; used to test the quality of of vacuum with a glass vacuum system such as a bell jar; if the vacuum is very good or very bad the Tesla coil has no visible effect when held upto the glass; if the vacuum is intermediate the intermediary air glows under the influence of the Tesla coil | 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: | 1954-1968 | Source: | University of Aberdeen | Creator: | Edward High Vacuum Ltd | Identifier: | http://calms.abdn.ac.uk/Geology/dserve.e... | Go to resource |
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