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Description: | 476 - 8 x 8 (in black ink). 096638 DES THOM,Alexander,Professor circa 1933 Thalassa, The Hill, Dunlop, Kilmarnock, Ayrshire, KA 3 4DH, Scotland. MANU Unsigned. circa 1934 [?Glasgow University Workshops] see correspondence in OHF:2.5 [Scotland] This is a manual squaring calculator. The device is in the form of circular slide rule with a series of six concentric circles. The inner four circle are on a ring of paper and they over lap, in places, one of the two outermost circles drawn on a sheet of paper with a circle cut out of the centre. The device is 300mm in diameter with a hole in the centre of 195mm. Three position on the inner three rings are marked 46, 32, and 9 but these values do not correspond to the values on the scales. It would appear that this is a protype of a mechanical computing device. With ratios of 46/476,32/476,9/476. N.B. The rest of the device turned up in the Archaeology department conservation laboratories in 1997 see entry form No. 145 there had been no work done on it. The machine is moved by a rod or pencill stuck into the small hole on the central perspex disc and rotated around the central axle.. The device solves for large numbers of similtaneous equations by iterative convergence or Liebmann's method, a branch of mathematics invented by Johann Carl Friedrich Gauss (1777-1855). Heinrich Liebmann (1874 - 1939). Thom developed his method in the 1920's for solving non-linear hydrodynamic equations. See correspondence in OHF:2.5. rules for using the instrument in 2.9 and the book in 7.28 | License: | http://www.hmag.gla.ac.uk/spirit/rights/ | Publisher: | Hunterian Museum and Art Gallery, University of Glasgow | Rights holder: | Hunterian Museum and Art Gallery, University of Glasgow | Subjects: | SCIENTIFIC COLLECTION : | Source: | Hunterian Museum | Creator: | Hunterian Museum and Art Gallery, University of Glasgow | Identifier: | http://www.huntsearch.gla.ac.uk/cgi-bin/... | Language: | en-GB | Go to resource |
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