The elements of dynamic electricity and magnetism (1903)
Atkinson, Philip. [from old catalog] · New York, D. Van Nostrand company · leaf 348
ts whose resistance is soadjusted that the resistance from the central point a ora of either relay through the rheostat to the earth is justequal to the resistance in the opposite direction throughthe line. T and T are transmitters (not sounders)operated by the keys and small local batteries… … e—1 ;^}2 DYNAMIC ELECTRICITY AND MAGNETISM, z and z\ and also connected with the earth. .SC andSC are resistance-coils, also connected with the lineand earth, whose resistance is made equal to that of thebatteries MB and MB respectively, so that the lineresistance to the earth shall be the same…
Electricity · Magnetism
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