24

DOC.

3

INAUGURAL LECTURE

Lecture delivered

to

the

Prussian

Academy

of

Sciences

in

Berlin,

2

July

1914.

Published

in

Königlich Preußische

Akademie

der

Wissenschaften (Berlin).

Sitzungsberichte

(1914):

739-

742.

Published

9 July 1914. A

two-page manuscript

has been

preserved ([1

001]).

One

signif-

icant

departure

from the

manuscript is

noted.

[1]A

salaried member of

the

Prussian

Academy,

Einstein had

no

obligations to

teach

or

per-

form other

time-consuming

duties

(see

Prussian

Academy

of Sciences

to

Einstein, 22

Novem-

ber

1913

[Vol. 5,

Doc.

485]

for the

terms

of his

appointment).

[2]The

manuscript

has "braucht" instead of “benutzt.”

[3]Max

Planck

replied

to

Einstein’s lecture

(see

Planck

1914b)

in

his

capacity

as

one

of

the

permanent

secretaries of the Prussian

Academy.

He

expressed skepticism

about the need

to

generalize special relativity to

include accelerated motion and

pointed

out

that the

current

ver-

sion of

general relativity

was

not

a

true generalization

of

special relativity

because

of

its

restricted covariance

(see,

e.g.,

Einstein and Grossmann 1914b

[Doc. 2]).

At the

same

time,

he

emphasized

the

importance

of Einstein’s

theory.

See

also Einstein’s

comments

on

Planck’s

reply

in

Einstein

to

Max

Planck, 7

July

1914.

[4]Einstein’s efforts, in

collaboration with Michele

Besso,

to

use

his

theory

to

account

for

the anomalous motion

of

the

perihelion

of

Mercury,

had been without

success

(see Vol.

4,

Doc.

14,

for their

calculations).

Efforts

to measure

the

predicted gravitational

redshift of

spectral

lines

were

inconclusive

(see

the

correspondence

with

W. H.

Julius

in Vol. 5),

as were

attempts

to

determine the

predicted

effect of

gravitational light

deflection

(see

the

correspondence

with

Erwin Freundlich

in Vol.

5).

At the

same

time,

preparations

were

under

way

for

an

expedition

to

observe

a

solar

eclipse

and collect data with which

to test

the

occurrence

of

light

deflection

near

the

sun

(see

Einstein

to

Henrich

Zangger,

ca.

20

January

1914

[Vol. 5,

Doc.

507],

note

6).