[Electric engineering.] . ter E. M. F. of slightly over 100 volts to take theplace of the lamp. The current remains about the sameand the life of the remaining lamps is not endangered. Ifas many as four or five lamps are out at once, the remaininglamps become somewhat dim on account of the fact thateach shunt coil introduces a little higher counter E. M. the amount of the drop through the lamp that itreplaces. All that is necessary to restore the circuit to itsnormal condition is to replace the burned-out lamps. Thissystem has the advantage that itis automatic in its action, requir-ing
[Electric engineering.] . ter E. M. F. of slightly over 100 volts to take theplace of the lamp. The current remains about the sameand the life of the remaining lamps is not endangered. Ifas many as four or five lamps are out at once, the remaininglamps become somewhat dim on account of the fact thateach shunt coil introduces a little higher counter E. M. the amount of the drop through the lamp that itreplaces. All that is necessary to restore the circuit to itsnormal condition is to replace the burned-out lamps. Thissystem has the advantage that itis automatic in its action, requir-ing no attention other than the re-placing of old or burned-out also has the advantage that itis not necessary to bring the cir-cuit to the station. One end ofthe circuit may be attached to themain at any convenient point andthe other end attached to the othermain, the only essential being thatthe two ends shall connect to thetwo sides of the circuit. It hasthe disadvantage that if a short circuit occurs on the line,. Fig. 42. /. III.—17 68 ELECTRIC LIGHTING. 16 a number of the shunt coils are liable to be burned shunt coils are mounted in cast-iron boxes, which alsoserve for the base of the bracket supporting the 42 shows the shunt-coil box. The hole a is tapped
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