XXIII.—On the Geometrical Mean Distance of Two Figures on a Plane
1872 ◽
Vol 26
(4)
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pp. 729-733
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Keyword(s):
There are several problems of great practical importance in electro-magnetic measurements, in which the value of a quantity has to be calculated by taking the sum of the logarithms of the distances of a system of parallel wires from a given point. The calculation is in some respects analogous to that in which we find the potential at a point due to a given system of equal particles, by adding the reciprocals of the distances of the particles from the given point. There is this difference, however, that whereas the reciprocal of a line is completely defined when we know the unit of length, the logarithm of a line has no meaning till we know not only the unit of length, but the modulus of the system logarithms.
2021 ◽
Vol 18
(3)
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pp. 421-427
Keyword(s):
2011 ◽
Vol 7
(4)
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pp. 123
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2021 ◽
Vol 26
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pp. 5-10
2021 ◽
pp. 42-47