Electrical engineer's pocket-book: a hand-book of useful data for electricians and electrical engineers (1901)
Foster, Horatio A. (Horatio Alvah), 1858-1913 · New York, D. Van Nostrand co.; London, E.& F.N. Spon, ltd. · leaf 76
onductivity, but of thesame cross section as the standard. E is a source of steady current, and ifa storage battery is available it is much the better for the purpose. M is amillivoltmeter with the contact device d. The distance apart of the twopoints may be anything, so long as it remains… … FlG, 57. line will, on either bar, be in proportion to the resistance, or in inverse proportion to the conductivity ; therefore by placing the points of d on the barsin succession, the readings of the millivoltmeter will give the ratio of theconductivities of the two pieces. For example : —if the…
Electrical engineering
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