. Conduction of electricity through gases and radio-activity; a text-book with experiments . length ofa spark in air and the minimum potential necessary to produceit, the following apparatus will be found convenient: (1) Asmall two-plate Wimshurst influence machine having plates35 to 40 cm. in diameter; (2) a battery of eight or ten Leydenjars, each of a capacity of about 1500 electrostatic units;(3) an electrostatic voltmeter with range extending from 200or 300 volts to about 30,000 volts; (4) an adjustable sparkgap with spherical terminals mounted so that the distancebetween them may be adju
. Conduction of electricity through gases and radio-activity; a text-book with experiments . length ofa spark in air and the minimum potential necessary to produceit, the following apparatus will be found convenient: (1) Asmall two-plate Wimshurst influence machine having plates35 to 40 cm. in diameter; (2) a battery of eight or ten Leydenjars, each of a capacity of about 1500 electrostatic units;(3) an electrostatic voltmeter with range extending from 200or 300 volts to about 30,000 volts; (4) an adjustable sparkgap with spherical terminals mounted so that the distancebetween them may be adjusted and determined accurately bymeans of a fine screw adjustment. Connect the different partsof the apparatus together as indicated in Fig. 2. See that theterminals of the spark gap are clean and well polished. Afterthe passage of each spark repolish them with a piece of cham- SPARK LENGTH AND POTENTIAL 3 ois leather, as the spark destroys the polished surface at thepoint where it passes. Keep the terminals also free from dustor moisture. Place the terminals of the spark gap in TERMINALSconductionofelec00mccluoft
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Keywords: ., bookcentury1900, bookdecade1900, bookid, booksubjectradioactivity
