EINSTEIN, Albert (1879-1955). Two autograph letters signed (“A. Einstein” and "A. Einstein") to Paul Epstein, [Kiel,] 14 August 1921, one being a cover letter for the other. In German. Two pages and one page respectively, 280 x 191mm, in pencil. Recommending the young Jewish physicist Paul Epstein for a post at Caltech: “Prof. Dr. Epstein is certainly one of the most prominent among the living theoretical physicists of the German-speaking world…”. Epstein had previously come to Einstein’s attention for his work on quantum theory, and Einstein had written a paper “On the Quantum Theorem of Sommerfeld and Epstein” in response. Einstein also refers to Epstein’s related work on the Stark Effect, which provided critical support to the then relatively new “Rutherford-Bohr atomic theory”, setting forth the model of the atom as we know it today. Epstein was accepted for the professorship at Caltech in 1921; Einstein would join him there as a visiting professor for the winter terms of 1931-1933. Einstein had perceived early on that Epstein might have a better chance finding a position in America than in inter-war Europe; there is some suggestion in his correspondence that as a foreign-born Jew, Epstein had been denied a job at Frankfurt in 1920.
EINSTEIN, Albert (1879-1955). Two autograph letters signed (“A. Einstein” and "A. Einstein") to Paul Epstein, [Kiel,] 14 August 1921, one being a cover letter for the other. In German. Two pages and one page respectively, 280 x 191mm, in pencil. Recommending the young Jewish physicist Paul Epstein for a post at Caltech: “Prof. Dr. Epstein is certainly one of the most prominent among the living theoretical physicists of the German-speaking world…”. Epstein had previously come to Einstein’s attention for his work on quantum theory, and Einstein had written a paper “On the Quantum Theorem of Sommerfeld and Epstein” in response. Einstein also refers to Epstein’s related work on the Stark Effect, which provided critical support to the then relatively new “Rutherford-Bohr atomic theory”, setting forth the model of the atom as we know it today. Epstein was accepted for the professorship at Caltech in 1921; Einstein would join him there as a visiting professor for the winter terms of 1931-1933. Einstein had perceived early on that Epstein might have a better chance finding a position in America than in inter-war Europe; there is some suggestion in his correspondence that as a foreign-born Jew, Epstein had been denied a job at Frankfurt in 1920.
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