(1872-1946) French physicist who developed Langevin dynamics and the Langevin equation. He was one of the founders of the Comité de vigilance des intellectuels antifascistes, an anti-fascist organization created after the 6 February 1934 far right riots.
Autograph letter signed, 1 1/4 pages (both sides), 5,25 x 8,25 inch, `École Municipale De Physique et De Chimie Industrielles` (`Municipal School of Industrial Physics and Chemistry`) letterhead, Paris, 11.09.1933, in French, to an unidentified male colleague - concerning future Nobel Prize-winning physicists Patrick Blackett (1897-1974) and Ernest Walton (1903-1995) in relation to the upcoming 7th Solvay Conference* to be held in Brussels, Belgium in late October 1933, written and signed in black ink "P. Langevin", with a horizontal letter fold and mild signs of wear to the edges - in fine condition.
"My dear friend,
You should have received copies of the reports for the Solvay Conference, that I would have wanted to get to you earlier, but that receiving them and reproducing them took more time than I thought - and I have just come through a particularly troubled period - I must apologize to you for not having responded to your letter from last May concerning establishing a list of invitations - M. Blackett has accepted to come to Brussels - The secretarial duties, like three years ago, will only be organized at the beginning of October, at the moment when a definitive list of participants will be sent - I intend to introduce M. Walton, either as a replacement or as secretary. I thank you for having signaled to me all the interest attached to the presence of these gentlemen.
Affectionately yours, - P Langevin."
* Paul Langevin chaired the 6th and 7th Solvay Conferences in Physics held in 1930 and 1933 respectively. The Solvay Conferences were a series of workshops that discussed open questions in the fields of physics and chemistry. The 7th Solvay Conference was held from October 22 - 29, 1933 in Brussels, Belgium, where over 40 conference attendees, including Langevin, Marie Curie, Ernest Rutherford, Enrico Fermi, Wolfgang Pauli, Neils Bohr, Werner Heisenberg, and others discussed the topic, "Structure and properties of atomic nuclei." Also in attendance were Patrick Blackett and Ernest Walton, whom Langevin explicitly mentioned in his letter.
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