Emil Cohn

“ Against the applicability of my equations – more precisely spoken of my interpretation of equations (C') – Lorentz has raised an objection. [10] According to these equations, as soon as are considered as true coordinates and times, the absolute (i.e. estimated with respect to a resting coordinate-system) speed of light in the direction is defined by (l.c., equation 16) ”

“ We apply the following theorems: in the theory of electrons it is given by definition, that
the "electric force" is the spatial average of the force upon a particle, charged by the quantity of electricity 1; the "electric moment of unit volume" , where is the relative displacement of , denotes a volume, and the sum is to be extended over all in this volume; the "convection current" , where is the relative velocity of . Now, let be the connected values in the case of rest. According to (3) ,
are corresponding to them for in the case of translation ”

“ Or in reality it is , so that the value of (5) is feigned by the deformation of the stone console (L) in the Michelson experiment. None of both assumptions may (in my view) be rejected by us for reasons of physical experience. The decision between the theories cannot be found here. ”