RESEARCH NOTES ON

RELATIVITY 199

gravitation

tensor

when

working

with

Grossmann,

but

had

abandoned

it

when

he

came

to believe,

incorrectly,

that

it

did

not

yield

the correct

Newtonian

limit.

On

[p.

45]

Einstein

briefly

considers another

way

of

generating

a new

quantity,

tensorial under

a more

restricted

group

of

transformations,

that also

has the

form of

eq. (1),

without

the

need for coordinate conditions. But

all

these efforts

are

in vain.

By [pp.

51-52]

Einstein

has

abandoned

the

search for

a

generally

covariant

gravitation

tensor.[29] In

a

neat hand,

Einstein

now

writes

out

a

synopsis

of

the

derivation of

the

gravitational

field

equations

of Einstein and Grossmann

1913

(Doc. 13).

The

remaining pages

of

Part

III

are

given

over

almost

completely

to the

task of

finding a

generally

covariant

formulation of

electrodynamics,

such

as

appears

in

Einstein and Grossmann

1913

(Doc. 13),

pp.

17-20.

[29]For

the

conjecture

that Einstein abandoned

the

gravitation

tensor

of

[p.

44]

because

its

associated coordinate condition

is

incompatible

with

the

metric of

a

Minkowski

space-time

viewed

in

uniformly rotating

coordinates,

see

Norton

1984,

sec.

4.