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Description: | Very large glass electronic valve with 2 wires, black and white, with holes for attaching to power source, extending from open base. A piece of corrugated cardboard is sticking out of the end as well. One of 2, no makers mark. The metal cylindrical workings on the inside are visible. Part of a massive collection of valves in a cardboard box. | 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: | 1800 | Source: | University of Aberdeen | Identifier: | http://calms.abdn.ac.uk/Geology/dserve.e... | Go to resource |
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