2 7 6 D O C . 3 3 0 F E B R U A R Y 1 9 2 0 to work. Guillaume’s notice is stupid, like everything this man dashes off about relativity. My booklet published by Vieweg is a popular account, thus probably not well suited to your purpose. It has not appeared in French yet but is presently coming out in English. For the purpose you have in mind, it may well be commendable to translate into French a collection of monographs on the special and general the- ories of relativity, which O. Blumenthal is publishing at Teubner under the title Das Relativitätsprinzip. My main papers are in there, too. A really good introduction to the theory of relativity for physicists does not, in fact, exist yet. That is why I have in mind to produce an edition of my lectures. But I still have to write them out first. I am glad that you have won over Debye for the Polytechnic. He is outstanding in every way and at the height of his productivity. Now I would like to approach you about two other men, each of whom would be of truly great profit to Switzerland: 1. M. Schlick, currently a private lecturer of philosophy at Rostock. In the past few years this still young man published a book on epistemology as well as a little book on the theory of relativity (Springer Verlag), both of which excited my admi- ration. His clear style reminds one of Stuart Mill. I am writing you this be- cause, as rumor has it, Medicus eventually intends to leave Zurich. He is in quite precarious circumstances and, as a non-Kantian, modern-thinking person and a pacifist, he has little prospect of a German philosophy professorship. Nationalistic considerations would be thoroughly misplaced with this very exquisite and com- pletely internationally oriented person. 2. The very well-known and original Viennese biologist Paul Kammerer finds himself in such dire straits that he is essentially deprived of any opportunity to work. I personally cannot vouch for the importance of his achievements, obviously: this others must judge, but I do want to point him out to you. As he is known as an internationalist, he [too] has little prospect of a professorship in Germany. Thus is the political mentality of academics assuming the form of blind obstinacy. Such a thing cannot change, just die out. The broader public, howev- er, is free of political passion. Cordial greetings also to your wife, yours.