St. John, Thomas M. (Thomas Matthew), b. 1865 · New York, T. M. St. John · leaf 145
gets so great that it overcomes the resistance of the air-■space between them, a brilliant spark passes, and they aredischarged. This sudden discharge is said to be disrupt-ive, and it is accompanied by a flash of light and a loudreport. T^epath of the discharge may be nearly straight, 141 142… … Fig. 21S. ruptive spark takes place in air at ordinary pressures.The nature of the spark is greatly changed when the pres-sure of the air decreases. Fig. 216 shows an air-tight glass tube so arranged that theair can be slowly removedwith an air-pump. Theupper rod shown can beraised or lowered to…
Electricity
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
