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Description: | box, black wooden frame with glass front and back. Brass rod connects a gold leaf to a top touch disc. Two brass blades either side of central blade connected to an external thumb nut contact. A threaded brass tube is screwed at an upward angle into one side of the wooden case | 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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