3 0 D O C . 2 N O T E O N P A P E R B Y S C H R Ö D I N G E R

stress due to the gravitational attraction between the two bodies. Assuming the

rod is straight and parallel to the -axis of the coordinate system, the first equa-

tion (1a) yields

.

Since in our case the first integral cannot vanish, the second cannot, either. There-

fore, cannot vanish everywhere on . This consideration can be

applied, mutatis mutandis, to all cases where the field under consideration brings

about interactions. However, this is not the case for the field that Schrödinger con-

siders.

In my opinion, the formal scruples (1) and (2) cannot lead to a rejection of the

momentum-energy theorem in the form I suggested. After all, the equation which

expresses the theorem is valid for an arbitrary choice of the system of reference;

and to raise additional formal demands does not appear justified. With respect to

objection (1), I stated my position in a paper which will soon appear in the Sit-

zungsber. d. Berl. Akademie.

Translator’s Note

{1} The reference is to document 41 in Volume 6.

x1

0

1

∫T1

dS t1

1

nx1) cos( t1

2

nx2) cos( t1

3

nx3))dS cos( + +

∫(

+ =

t1

1

t1

2

t1

3

, , S

[7]