The mathematical theory of electricity and magnetism (1911)
Jeans, James Hopwood, Sir, 1877-1946 · Cambridge [Eng.] : University Press · leaf 70
Fig. 24. Angle greater than two right angles external to conductor. … Fig. 2.5. Angle less than two right angles external to conductor. 71. The arrangement shewn in fig. 25 is such as will be found at thepoint of a lightning conductor. The object of the lightning conductor isto ensure that the intensity shall be greater at its point than on any partof the buildings…
Electricity · Magnetism
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