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Description: | on a triangular wooden base with three adjustable feet. Two vertical wooden circular frames separated by four brass rods, hold wire coils connected to four brass terminals. In the middle a turned wood pedestal holds a horizontal circular scale of four 90 deg quadrants with a parallax mirror. A brass gantry supports a suspended needle below a rotatable scale. The needle is missing. Marked on the scale is A Spark Aberdeen | 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 | Source: | University of Aberdeen | Creator: | A Spark | Identifier: | http://calms.abdn.ac.uk/Geology/dserve.e... | Go to resource |
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