DOC. 487 MARCH

1918 507

[18]Comments in

draft:

“I

find

it

very

remarkable

that

at

the

end of his

lect[ures]

of

1916

Lorentz stated

he

was

satisfied

with

postulating

in addition to

field equations

(a)

a

double

energy

current,

the

two

components

of which

constantly compensate

each

other.”

...

“It contains

precisely

the

agreement

of

the

grav.

mass

and inertial

mass

to

which

you

assign so

much

weight.”

[23]Draft postscript:

“P.S. “On

Cosmology.”

Previously

already,

and

not

spherical space

but

elliptical.

Case of Schwarzschild’s

sphere

for

Xa

=

n/2

4-dimensional

space

with

constant curvature

kp0/3.

Hence R

=

\3/kp0,

whereas

you indicate /2/kp0.

P

=

-P0 Scheme

-p

0

0

0

0

-p

0

0

0 0

-P 0

0 0 0 -P

, which

does not

agree

with

Schrödin-

ger either. Mass

content

ir2R3p0.

The

Kvv's

all

become, according

to

Runge’s

letter,

=

-Kp0

which

agrees

with

the

premise

Kvo

+

k

.

Tav

=

0.

That is

why

Kuv

=

-k

.

p0guv.

Thus

I find Einstein’s

A

=

Kp0,

while E. himself has

kp0/2.

So

I

am

quite

close to

Einstein,

but the

numerical

coeffs.

do not

agree.

(Schw[arzschild]

must have

calculated

correctly,

after

all:

Fréedericksz

and

Runge

have checked him

independently.)”

[25]Draft

text: “In

particular,

another

“travel

copy”

has been made. Prof.

Conrad

Müller, Hanover, my

longtime

collaborator

at

the

Math.

Encyclopedia,

has

taken it

for

a

while

and

will send it

on

to

you

around Eastertime.”

[26]Draft

passage:

“What

I

say

about

Riemann,

Beltrami,

and

Lipschitz

will

prob-

ably

be

applauded

by you

right

away;

it

appears

to

me

that

at

the

t[ime]

Grossmann

had

given you

too one-sided

instructions

from

the

point

of view of

the

more

limited

Christoffel

School. On

the other

hand,

you may

find

some

objection

when I

consider

some

of

what

you

aim at

with

your

relativistic

conception

as

long

since

contained

in

Lagrange’s equations.

For

this

you

must not look at

me as a

one-sided

formalistically

inclined

mathematician but rather

as a man

who in his

life

development

was

led

over

by

chance to

the math.

side

and

is

now

trying

to

demonstrate the

knowledge

that

he

has

gained

there

also

with

regard

to

its

significance

for

neighboring disciplines.”