This picture was taken by Helen Muller (daughter of Hermann and Thea) at about 4:30 pm on Aug 23, 1963 near Elk Lake in the Adirondack Mountatins in upper New York State. It shows Hermann (Joe) meeting Thea just after his descent from Boreas…
Handwritten outline in pencil by Hermann J. Muller for a monograph containing the pioneer investigations of chromosomes and analysis of linkage, c.1928.
Typed list of materials to be brought to the Russian Institute of Genetics by H.J. Muller and C.A. Offermann with handwritten notes and additions, c.1932.