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Title: Null balance Megger earth tester, patent number 963374, cata [Go to resource]
Description: Null balance Megger earth tester, patent number 963374, catalogue number 63220, instrument number 2038884, by Evershed and Vignoles Ltd, Acton Lane Works, Chiswick, 1950-68. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: earth tester Temporal: 1950-1968 Source: Science Museum Identifier: 1997-586 Go to resource More Like this...
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