2 8 6 D O C U M E N T S 2 7 1 , 2 7 2 M A Y 1 9 2 6 I would also like to note that I have accepted an assistantship under Prof. Pohl at Göttingen as of July.[6] A collaboration on these problems will be very much eas- ier from there. Very respectfully yours, E. Rupp 271. To Michele Besso [Berlin,] 1 May 1926 Dear Michele, I read that paper right away at the time, but I don’t think that anything more pro- found lies behind it.[1] There is, naturally, a rough connection between a decrease in volume and energy, and from here one can try to come nearer to the empirical phenomena by introducing further parameters. But this happens in such a way that neither rhyme nor reason can be made of it. It is very reminiscent of Traube.[2] Using such apothecary’s methods one cannot reveal any of God’s secrets, I think. Schrödinger did a couple of wonderful studies on quantum rules (Ann[alen] d[er] Physik).[3] That has the scent of a deeper truth. Let it be explained to you. I’m coming to Switzerland in July. End of July is the L[eague of] N[ations] meeting in Geneva.[4] Then I’m going somewhere into the mountains with Tete.[5] So I’ll visit you, or else we can meet. Warm regards, also to Anna and Vero,[6] your Albert 272. To Hendrik A. Lorentz [Berlin,] 1 May 1926 Dear and esteemed Mr. Lorentz, If you wish me to assume the review of quantum statistics,[1] I shall be glad to do so, because I can never say “no” to you without pressing reasons. Schrödinger’s version of the quantum rules impresses me very much [2] this seems to me to be a piece of the truth, even though the meaning of waves in n-dimensional q-space remains so much in the dark. The selection of two persons out of the whole Heisenberg, Franck, Born, Pauli[3]