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Description: | Wooden base with short brass stem onto which is fitted a blackened copper torus 160 mm O/D, 112 mm i/d with gap 6 mm. Torus in hollow (tube wall, approx. 0.8 mm) and tube is made from folded sheet. Brass fittings provide screw joint for 2 halves of ring. Wooden base seems to have two small end pieces missing that would have formed a slight hollow base foot 3.5 mm high. A forgotten demonstration by Charles Wheatstone. Hollow for ' Univ. Abdn. Nat. Phil. ' disc. | 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: | 1840-1855 | Source: | University of Aberdeen | Creator: | ' WATKINS & HILL / 5 CHARING CROSS / LONDON ' on ivory plate. | Identifier: | http://calms.abdn.ac.uk/Geology/dserve.e... | Go to resource |
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