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The electron, its isolation and measurement and the determination of some of its properties

John Stuart Mill · en
agitation of, 80, 81, 194

Moseley’s discovery, 196, 203;

atomic numbers, 198, 200, 203;

atomic weights, 202; X-ray

frequencies equal, 246

Moseley’s law, 204 f.; inexactness

of, 216

, value of, in electrolysis, 31;

in gases, 35, 262

, discrepancies, 168 ff.; in gases,

34, 125, 166 f.; value of, for

electrolysis, 30, 31; value of, for

negative and positive ions, 125

Norman Bridge Laboratory, 4

Nucleus: of atom, 193; charge on,

195; number of electrons in,

207, 277, 281

Peltier effects, 20

Perrin’s value of , 170

Photo-electric effect, 236, 244, 246,

255

Planck’s , 117, 212, 213, 242, 245,

261

Positive and negative electrical

charges, , 12

Quantitative measurements in

gases, 147

Quantum theory of radiation,

Einstein’s, 237 f.; Planck’s, 253

Radiant energy, 242, 245; nature

of, 232

Radiation, black-body, 237; discontinuous,

244; quantum theory

of, 237, 253; theories of, 232;

Thomson’s ether-string theory,

236, 237

Radium, conductivity in air due

to, 33; as ionizing agent, 53, 57,

79; mechanism of ionization by,

125; structure of atom of, 230

Resistance to motion independent

of charge, 86

Rutherford’s method, 277

Rydberg constant, 210, 282; value

of, 282

Ryerson Laboratory, 4, 37, 93, 94,

95, 150, 178, 209, 239

Stark effect, 219

Stefan-Boltzmann constant , 117,

261

Stokes’s law, 48, 49, 52, 55, 63,

66, 167; correction of, 98 f.,

101, 113, 162; failure of, 90 ff.,

93, 98, 163; limits of validity

of 95 ff.

Sub-electron, 161 f., 166, 175,

181

Thomson-Einstein hypothesis, 253

Valency in gaseous ionization,

127 f.

Velocity of agitation of molecules,

8; of emission of electrons under

monochromatic light, 245

Velocity of drop, 86, 101

Vienna Academy, 153, 175

Viscosity of air, 93

Wave theory, 233, 234

Wien constant , 117, 261

X-rays, 23, 33, 39, 40, 46, 50,

57, 192, 204, 235, absorption of,

199; Duane’s method, 214;

frequencies, 202, 246; ionizing

agent, 79, 126, 134;  and

series, 204; and light, 248;

mechanism of ionization by,

125; monochromatic 246; photographs

of spectra, Fig. 21;

spectra, 196, 200; spectrometer,

197; wave-lengths of metals, 197

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