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Description: | two nickel (?) balls mounted on insulating rods affixed to a wooden base. Connection is made to the balls by plug in brass connectors, the connecting wires have been cut off. Mounted on a rectangular wooden base with four rubber feet, one ball can be moved by a long brass adjusting screw with thumbnut | 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: | Fraser & McKay Scientific Instrument Makers | Identifier: | http://calms.abdn.ac.uk/Geology/dserve.e... | Go to resource |
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