Smithsonian Astrophysical Observatory Radiation and Organisms Division Search this
Smithsonian Institution Building (Washington, D.C.) Search this
Century of Progress International Exposition (1933-1934 : Chicago, Ill.) Search this
4 x 3.25;
Between 1929 and 1934
See also MNH-11036G.
Leland B. Clark, research assistant, in the glass blowing room where special apparatus for plant research is made for the Division of Radiation and Organisms in the basement of the Smithsonian Institution Building, or Castle.