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FOR MANAGERS AND OPERATORS 665
operators going to some distant village to give a show, only to discover upon arrival that, for instance, the machine crank had been left behind, or there were no carbons with the outfit, or that the lamp leads or lenses had been omitted, or there was no empty reel for the lower magazine. In this respect an ounce of prevention is worth more than a ton of cure, and out in an isolated village you will not be able to get a duplicate of any parts you may through your carelessness have omitted.
It is advisable to take with you at least 250 feet of stranded rubber covered wire, size No. 6 B. & S. On arriving at the building where the show is to be given, first ascertain whether the current is A. C. or D. C., and if the former whether or not there is a pole transformer. If there is, investigate and see if it is large enough to supply current to the arc, in addition to whatever else it may be supplying, always remembering that a commercial transformer can carry a 50 per cent overload for an hour or two without in any way injuring it. If you have any doubt whatever as to the transformer being large enough, it will be advisable to see the light plant people about it, and sometimes a good cigar or two will work wonders in convincing the local electrican that the transformer is large enough to carry your load. The next thing is to determine whether or not the wires entering the building have sufficient capacity to supply your arc in addition to whatever else they must supply. It is also necessary to investigate the size of the meter (if there is one) and fuses. If all. these various things are found to be of ample size, the next thing is to determine the best place to connect your wires. If there is a panel board near where you desire to locate your machine, and it is fed by wires large enough to carry your arc, plus whatever else they must carry, you may connect to the board, if possible through a circuit service switch. However, this detail will vary with different boards. If there is no panel board, or if the panel board feeders are too small, it will probably be necessary to carry your wires to the main cutout and make connection there. If the wires entering the building are too small you will be compelled to run your own wires out of some convenient window or other opening, and connect to the secondary (if there is a transformer) right up close to the transformer, supporting your wires in any convenient way, high enough so that no one can touch them. In deciding whether or not the wires entering the building are large enough don't forget to figure the load they must carry in addition to your arc. The volt