TREE, JAMES |
England, c.1850, MIM |
Slide Rules, Ewart-type = P.C., D.(1984); Rules (16), silvered brass = Phillips 2/2/84; Clinometer = Phillips 6/15/76. |
the Ewart-type slide rules are marked "The Cattle Gauge and Key to weighing machine arranged by J. Ewart, Newcastle-on-Tyne"; showed in the Great Exhibition of 1851 in London. |
22 Charlotte Street, Blackfriars Road, London. |
Delehar 2; Coffeen H; G.L'E. Turner 24; USNM; RSW. |
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