D O C U M E N T S 2 6 8 , 2 7 0 J U L Y 1 9 2 2 2 1 3 267. From Raymond de Rienzi[1] Paris, 6 July 1922 [Not selected for translation.] 268. From Marie Curie-Sk odowska Paris, 7 July 1922 Dear Mr. Einstein, I received your letter, which caused me great disappointment.[1] The reason you offer for your abstention does not seem convincing to me. It is precisely because dangerous and harmful trends of public opinion exist that it is necessary to combat them and in this regard you can exert an excellent influence solely by virtue of your personal reputation, without having to put up a fight for the cause of tolerance. I believe that your friend Rathenau, whose sad lot I regretted, would have encouraged you at least to try to bring about peaceful international intellectual col- laboration. Couldn’t you still change your mind? Your friends here have fond memories of you. M. Curie. 269. From Gustave Le Bon 29. rue Vignon. Paris. 7 July 1922 [Not selected for translation.] 270. From George Jaffé Leipzig, 26 Ferd. Rhode St. III, 8 July 1922 Highly esteemed Professor, Today I take the liberty of informing you about a brief consideration on the “rel- ativity of mass,” because under no condition do I want to publish anything on this problem without first having it subjected to your critique. I start from Schwarzschild’s solution into the form: