Hans Witte

“ A potential influence of a possible temporal duration of the reflection process itself, is of course neglected (as it was also done by Sagnac) . My conclusions are also based on the assumption, that the often disputed process of rotation of a rigid system as such, constitutes no problem for the relativity principle. ↑ For example, also for that one (changing continuously) , in which point is present at every moment (in the direction of the circle tangent, the velocity relative to the "rest"-inertial system is as given above) . ”

“ If one considers the rotating system from the view of the rest-system, then the light ray which is following the same direction of the rotation, experiences a path-elongation corresponding to the factor , yet also a velocity increase corresponding to the same factor , which is canceling each other; the same arises at the oppositely moving ray ; there, is the orbit velocity of () , is the speed of light. ”

“ The imagined rotation of the system shall happen counter-clockwise ()
thus the relative aether circulates clockwise () in relation to the system imagined as being at rest.
Of the two light rays denoted by and , which are circulating clockwise and counter-clockwise, one (namely ray ) at first travels faster away from , then in the same measure faster around the whole circle, and also faster back to point ; the other one, , is held back in the same way. ”

“ In this view, a real contraction occurs for light path , and for light path a real elongation, since the light paths are in the same approximation as above and . If one computes the phase displacement, then the same amount is given as above (formula 6) . ”