Lessons in practical electricity; principles, experiments, and arithmetical problems; over four hundred illustrations; an elementary text book (1909)
Swoope, C. Walton (Coates Walton), d. 1901 · New York, D. Van Nostrand company · leaf 377
Fig. ARMATURES. 359 potential, which is capable of being regulated. The voltageis then increased till a spark passes iroui pLite to pLtethrough the specimen, thereby puncturing it. as i.i Kxp 88page 323. The following insulating materials anJ the vol-tages at which they broke down under test will…
Electricity · Magnetism
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