EXPERIMENTS
NUMBER
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1—1.
To Measure the Charge of the Electron.
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1—2.
Avogadro’s Number from Brownian Movements.
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17
2—1.
Measurement of e/m by the Helical Method.
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38
2—2.
Measurement of e/m by a Modied Lenard
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2—3. '
Alternative Method of Measurinë e/m. . . . . . . . . . . . . . . . . . .. 45
3—1.
TheDiñ'ractionofElectrons.........…..…...........….
63
4—1.
AStudyofPhotoelectricCells.........._."................
90
4—2.
AStudyofaPhoto-voltaic Cell...
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92
4—3.
The Spectral Distribution Curve of a Photoelectc Cell.
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93
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4—4.
The Ratio of Planck’s Constant to the Charge of the Electron 95
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5—1.
A Test of Richardson’s Equation. . . . . . .
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112
6—1.
Characteristic Curves of Triodes.
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134
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6—2.
135
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6—3.
ConstantsofVacuumTubes..….……….................. 136
7—1. MinimumIonizingPotentia1s…...........…..…......... 152
7—2.
Ionization and Excitation Potentials of Mercury. . . . . . . .…'.
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154
8—1.
Ionization Current Measurement With a Quadrant Electrometer
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8—2.
Measurement of the Absolute Value of an Ionization Current
and the Capacity-of an Electrometer System.. . . . . . . .
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181
8—3.—
AStudyoftheGlowDischarge. . . . . . . . . . . . . . . . . . . . . . . . . .. -181
8—4.
AStudyWithPr‘obes..................…_....….....…... 185
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8—5.
Striking Potentials ofa
Triode.
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188
9—1.
The Absorption and Waveength of X—rays. . . . . . . . .
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214
9—2-“LauePhotographs.........‘.....................‘...…... 216 '
9—3. Studies WithaBragg Spectrometer. . . . . . . . . . . . . . . . .
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10—1. PositiveRayParabolas. . . ._ . . . . . . .
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237
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_11—1Î
of Radioactivè Substances. .…. . . -. . . . . .
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254
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11—3. -_Rate
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11—4
Emanation.
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257
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11—5Decay of
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258
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Method . .. .
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12—2RangeofAlphaParticleS—Elec‘ürlcal Method
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12—3A1rEqulvalentandSt0ppmgPoweff0rAlphaRays
287
17—1AStudyofauadrantElectmmeœr 415
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