Typed letter from H.J. Muller to Elof Carlson regarding Elof's appointment to UCLA and about the difficulties of presenting resonable eugenics ideas to the public due to the influence of the Nazis and those who continue to think like them, 1960.
Typed copy of a letter with out signature from Elof Carlson to H.J. Muller regarding Drosophila genetics, a publication of Muller's major works, and the work of Carl Sagan, 1960.