INDEX 631
riaan
D.,
545n;
and radiation
theory,
250,
253n, 281n,
499-500,
505n-506n,
507,
515n;
and statistical
mechanics,
553-554,
556-557.
See
also
Clausius-Mossotti-
Lorentz relation
Lorentz's
contraction
hypothesis,
140, 161,
478-479; existence
of,
444, 482-483, 484n.
See
also
Length
contraction
Lorentz's
theory
of
electrons, xix, 136, 138,
142-146,
344, 398n, 445,
449n
Lorentz
transformations, 175n;
derivation
of,
156-160, 439n;
formal
properties of,
167-
170;
fundamental
importance of, 166; physi-
cal
interpretation
of,
160-166. See
also
Rig-
id
bodies;
Transformations
Loschmidt's
number,
272
Luminescence, 503,
504n
MacDonald,
David Keith Chalmers
(1920-
1963):
correspondence
with
AE,
562n
Mach,
Ernst
(1838-1916),
[578];
definition
of
mass, 5, 9, 126n,
396n;
letter from
AE,
5
Madelung,
Erwin
(1881-1972), 414n, 420,
420n,
526,
544n
Magnets, 349;
permanent,
354, 375;
relative
motion between, and
conductor,
141-142,
369-370.
See
also
Electrodynamics
Magnetic
fields, 132,
138, 142,
170-171,
255-256,
257n,
272-273,
349, 353, 374,
388, 555;
of
currents,
353
(see
also
Electric
current); decomposition
of, 377;
determina-
tion of,
370, 398n;
differential
equations
of,
356;
energy
of, 350;
intensity
of, 136, 255,
399n
(see
also
Force,
electric);
motion
in,
369-370,
518n;
and
permanent magnets,
354;
properties
of, 354;
of
a
wire, 383,
399n. See
also
Electric field
E; Electromag-
netic
fields;
Molecules; Relativity, special
theory
of
Magnetic
force. See
Magnetic
fields
Magnetic
monopoles,
nonexistence
of,
348
Magnetic
saturation,
226
Magnetic susceptibility,
398n
Magnetism, 217,
221-227,
245n, 348, 518n;
AE's
lectures
on electricity
and, xvii, 8,
126n-127n,
316-396,
396n-400n,
598-599;
bound, 349; change in, 226;
kinetic
theory
of,
518n;
nonexistence
of
true, 389;
units
of,
518n. See
also
Permeability
Magnetometer,
360
Magnus,
Alfred (1880-1960), 476n
Maric, Mileva
(1875-1948), 125n, 178n, 321,
397n;
letters from
AE, 5, 7,
175n
Mariotte's
law,
308
Markov,
Andrei Andreevich (1856-1922),
268n
Marx,
Erich (1874-1956), 504n
Marx, [576]
Mass,
5,
24, 64;
concept
of, 396n; conserva-
tion
of, 174,
438,
488;
of
electrons, 439n,
443;
and
energy
(see Mass-energy equiva-
lence);
equivalence
of
gravitational
and iner-
tial,
5,
21, 126n,
488-491; inertial, xxix,
21;
Mach's
definition
of, 9, 15, 126n, 396n;
unit
of,
19
Mass-energy equivalence,
64, 174,
437-438,
448. See
also
Energy,
and
mass; Equivalence
principle; Experiments
Mass
point,
fundamental
equations
of,
11-18,
26-36, 124-125, 125n
Mathematics and
physics,
152, 426,
447-448.
See
also
Probability; Simplicity
Matter, 11, 506n;
atomic constitution of,
136,
283-284;
ponderable,
131,
325. See
also
Ether
Maxwell, James Clerk
(1831-1879),
127n
Maxwell distribution
law,
209-211,
242n,
244n, 507n, 508;
constant
of,
211. See
also
Velocity
Maxwell's
electromagnetic theory,
xviii, 135,
178,
283-284,
366, 457,
465, 517,
523,
542-543, 556. See also
Electrodynamics;
Electromagnetic theory
Maxwell's
equations,
xix, 9, 136, 178n, 276,
298,
311n,
358, 386, 422, 517, 557;
with
constant dielectrical
constant, 298;
validity
near
oscillator,
507
Maxwell-Lorentz
equations,
170, 250,
252
Maxwell
stresses,
394
Measurement:
of
light deflection, 497n;
of
light
speed, 431;
of
self-induction, 373; units,
126n. See
also
Conventions;
Experiments;
Length; Optical measurements;
Residual
rays;
Time
Measuring
instruments, 9;
for small
charges
(AE's
Maschinchen), 9,
339-341,
397n-398n;
Thomson's
multiplier,
340-341;
voltage
339-341,
397n. See
also
Clocks;
Electrometer; Galvanometer;
Gyroscope;
Magnetometer; Radiometer; Rigid
rod
Mechanics:
AE's
lectures
on,
xvii,
3-9, 11-
125, 125n-129n, [572], [593],
598-599
(see
also
AE's
lectures); classical, 5, 8,
132-
133,
396n,
423,
426, 487, 550, (see
also
Newtonian
mechanics);
elastic forces
in,
461;
and
electrodynamics,
523;
foundations
of,
466,
524;
general principles
of,
4, 68,