398

DOC.

38 QUANTUM THEORY OF RADIATION

Published

in Physikalische Gesellschaft

Zürich.

Mitteilungen

18

(1916):

47-62. Published

after

24

August

1916 (see

Einstein

to

Michele

Besso, 24

August 1916,

in

which Einstein

men-

tions the

completion

of the

paper).

[1]Einstein lectured

on

the

topic

of this

paper at

the

meetings

of

27

October and

10

Novem-

ber

1916

of the Deutsche

Physikalische

Gesellschaft

(see

Deutsche

Physikalische

Gesell-

schaft. Verhandlungen 18

(1916): 367,

368).

Some of the results of this

paper

were

earlier

published

in

Einstein

1916j

(Doc.

34).

[2]See

Wien 1894.

[3]See

Wien 1896.

[4]See

Einstein

1905i,

1909b

(Vol. 2,

Docs.

14

and 56),

and

Lorentz

1912

for several dis-

tinct

approaches to

this issue.

[5]See

Rayleigh

1900.

[6]See

Planck 1900b.

[7]Einstein

1916j

(Doc.

34).

[8]Commenting on

this

paper

in

a

letter

to

Besso,

Einstein

emphasized

this

point

in

partic-

ular

(see

Einstein

to

Michele

Besso, 24

August 1916).

[9]"u"

should

be "v."

[10]Einstein

1917c,

the

republication

of this

paper

in

Physikalische Zeitschrift,

has

"Hypo-

these"

instead of

"Hypothesen."

[11]See

Bohr 1913,

Sommerfeld

1915,

and

Epstein

1916a.

[12]See

Einstein

1916j (Doc. 34),

p.

323.

[13]Einstein first applied

methods that

he

had devised for

studying

Brownian motion

to

the

radiation

problem

in

Einstein 1909b and Einstein 1909c

(Vol. 2,

Docs.

56

and

60). He

used

them

again

in

his work with

Ludwig Hopf,

Einstein and

Hopf

1910b

(Vol. 3,

Doc.

8),

and with

Otto

Stern,

Einstein and Stern 1913

(Vol. 4,

Doc.

11).

See

also Klein

1964

for

a

historical dis-

cussion.

[14]In

Einstein 1917c the

following

words

are

inserted between "des"

in

the

previous

line

and "wir": "Moleküls besonders

in

Rechnung gezogen

haben,

werden."

[15]This

use

of the

equipartition

theorem

in its

most general

sense

goes

back

to

Einstein's

first

paper

on

Brownian

motion,

Einstein 1905k

(Vol. 2,

Doc.

16).

[16]See

also

Friedberg

1994 for

an

alternative derivation of the

quantities

R

and

A2

[17]Kurd

von

Mosengeil's

dissertation

was

posthumously published

as

Mosengeil 1907.

It

was

prepared

for

publication

by

Max

Planck,

who had been

Mosengeil's supervisor.

[18]Einstein

had

always recognized

that theoretical

results

might

be,

and often

were,

much

more

general

than their

derivations seemed

to

indicate.

See, e.g.,

Einstein 1903

(Vol.

2,

Doc.

4)

and Einstein

1904

(Vol. 2,

Doc.

5).

[19]"coscp"

should

be

"coscp'."

[20]"yv" should be

"Xv."

[21]Thirty

years

later,

Wolfgang

Pauli drew attention

to

these

significant

remarks

in

a

paper

written for Einstein's sixtieth

birthday.

See

Pauli

1949, in

particular

p.

156.