Austrian research chemist Edith Kroupa, 1934. The original caption dated September 18, 1934, reads: "While revolution upset Vienna, Miss Edith Kroupa, research chemist working with a new method of microchemical analysis in the laboratory of Prof. A. Franke at the University of Vienna, analyzed a sample of radioactive rock from near Winnipeg, Canada," determining it to be over 1,725,000,000 years old. Earlier that same year, Kroupa and her colleague Friedrich Hecht had discovered triple-weight hydrogen.
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Source
Smithsonian Institution Archives
Headline
Edith Kroupa
Image title
90-105, 12, "Portraits, Edith Kroupa"; "Austrian research chemist Edith Kroupa, 1934. The original caption dated September 18, 1934, reads: ""While revolution upset Vienna, Miss Edith Kroupa, research chemist working with a new method of microchemical analysis in the laboratory of Prof. A. Fran"
Author
Science Service
Short title
SIA2008-4975
Date and time of data generation
11:40, 25 January 2011
JPEG file comment
90-105, 12, "Portraits, Edith Kroupa"; "Austrian research chemist Edith Kroupa, 1934. The original caption dated September 18, 1934, reads: ""While revolution upset Vienna, Miss Edith Kroupa, research chemist working with a new method of microchemical analysis in the laboratory of Prof. A. Fran"