In the mentioned report of Laub, one can also read about other similar experiments, to which one is quite consequently led by Lorentz's standpoint, yet which can have no meaning in Einstein's theory.
Eventually I would like to remark, that it is not allowed without further ado, to transfer that contraction arising at a translation, to the case of rotation. The occurrence of that contraction is in connection with the change of clock rate due to motion. In rotation, however, the time parameter changes in another way, and changes not at all when the observer is in the center, as it is easy to show.
Agram, February 5, 1911.
(Received February 8, 1911.)
