Chicago : [Popular Engineering Pub. Co.] · leaf 583
POPULAR ELECTRICITY 289 lower one, resulting in a B discharge to earth. The third and fourth illustrations show modifications of this class, the discharge at A precipitating a discharge at B, the place where B occurs having been subjected to no preliminary strain. With the A flash the differ- ence… … the building and from the air ter- DISCHARGE INDUCED BY A DISCHARGE BETWEEN minals of the lightning rods seems to prepare the path for the real UPPER CLOUDS discharge and neutralize its force to a great extent when it does come. The at equally high efficiency in either direction. heated air from…
Electricity
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