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Description: | Metal disk with scale (0 to 25), with second smaller metal disk that turns. Brass pointer attached to top disk above scale. 2 brass terminals on lower disk and a wire attaching the two disks. Engraved on the top is "Univ. Abdn. Nat. Phil., NALDER BROS & Co. LONDON, No. 7004, MILLIHENRYS". | 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 | Creator: | NALDER BROS & Co. | Identifier: | http://calms.abdn.ac.uk/Geology/dserve.e... | Go to resource |
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