Instructions for testing telegraph lines and the technical arrangements of offices (1878)
Schwendler, Louis, 1838-1882 · London : Trèubner · leaf 218
sonof the year as when the localisation test was made. Themost general formula for the localisation of a contactthus becomes : Example.—Between two lines, each 300 miles inleiiirth, occurs a contact. Both lines consist of No. 24wire throughout. By direct measurement we get, at 9hours in the month… … Putand but V is evidently the value found by direct measurement (formula 61).Thus we have X={iu- J{R-w){W-iv)}{l + e)-elThe value of X, we may also write x = v (\ + e) — le = V + € {v - I)Thus X ^ V if V ^ I, and X^viiv^l;v = l can only be obtainedwhen either i=»co, or 3 = 0, in both of which cases…
Telegraph · Telegraph lines
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