Hobart, H. M. (Henry Metcalf), 1868-1946 ed · Philadelphia, J. B. Lippincott · leaf 38
Its spe-cific resistivity is about 47 microhms per cmcube, and its coefficient of increase of resist-ance for 1° C. is 0-00033 of its resistance at0° C. For an explanation of some variationsin the resistance of standard manganin coils,see Eosa and Babcock, Elec, vol. lix, p. 339;Jaeger and Lindeck,… … Manhole for the purpose of making joints, pullingcables through ducts or pipes, or for simi-lar reasons. Manholes are placed at inter-vals of, say, 80 or 100 m from one another,and are generally lined with brick or tile.They vary in size up to chambers 3 m or soin depth. They should, in all cases,…
Electrical engineering
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