500 ,
‘
INDEX
Uranium series:
Velocity (Com.)
—
chart, 242
-—
of beta particles, 276, 36
——
table, 471
.
—
of electrons; 20—48
—-—
transformations, 243
—
exper., 38—47
——
transmutations, 336
——
in a gas, 168, 170
Urey, 232
——
table, 466, 467
—
vs. potential, 28, 466, 467
Vacuum:
—
of ions, 161
-—
gauges, 364—370
—
of positive ions, 223
-———
production, 354—364
—
of protons;
.
——
pumps,
354—361
——
table, 465
.
——
sparks, 177
.
—
of slow neutrons, 333
—
technique, 371—386
——
1/v law, 336
—
x-ray, 194
,
—selection;
Vacuum tubes:
——
of beta rays, 36
——
accelerator type, 303
——
of positive rays, 223, 229
'
—
beam power, 128
Vibrating ber gauge, 367
.
——
constants, 119—123 -
Villard, 297
__
——
exper., 136
.
Viscosity of air, 6
——
electron multiplier, 127
Visibility curve:
.
-—
RP. 54: tube, 124
—
of the eye, 71, 87 '
.
——
circuits, 408
Voltage:
-—
ve-electrode;
,
-—
amplication constant, 119
——
see pentode.
.
——
calibration of electrometers, 400
_
»——four—electrode;
——
exper., 416
——
see tetrode._
’
——
calibration of electroscope, 394
-—
high voltage rectier, 299
‘
—
constant supply, 421
—
pehta—grid converter, 129:
—
disintegration, 179
-
f— screen grid, 125
——disruptive, critical, 445
'
——
three—electrode;
'
——
doubler, 297
———'sæ triode.
'
-
'
—
extinction, 165
.
_
'— two-electrode;’
_
__
,
-—
for x-rays, 65, 193, 195
_
-
_— see diode.
-
,
…
_
—-—
high—, technique, 442—449
.
,
377
-
—
—
,
_
-—
insulation problems, 445
j
——
Edison effect, 99
'
-
'
-—
lumped, 120
.
"
de Graaff, 299
'
——
measurement of high-, 442—449
Î
,
Vapor pressure of:
'
,
,
-—
table, 461
-
’
:
_— mercury, 374
_
'
—
of electrons in a gas, 170
'
—-—_water, 374, 355
"
,
,
operating, of counter tubes, 428
,
375 ' '
,
…
"
—
-—‘over—, 429
"
,
.
-
_
tubes, 1215
.
-—_— production of high—, 296—303 -
.
_
_
Velodty:
,
-
'
,
'
-—
source for oil drop exper., 15
_
_
,.
—
lter, 36, 229 "
' _
,
_'——461
‘_
_
_
_
,
'
—group, phase, 60
*
_
’
'
'
-—
stabilization of, 421 ;
'
' ,
,
'
,
g
"
-'_— næbil‘itÿ‘of ions,161
_
_
_
:— striking, 164,178
'
'
'
'—— of alpha-particles,
_
—
'
——_threshold, 429
,
._
,
—'
_' —-— table, 462,464'
.
‘
_,
,
visual, critical, 445
__
'
‘