uring World War I as a chemist at Hammersley Paper Mill and then won a scholarship to Yale University in New Haven, Connecticut, where she earned a doctorate in biochemistry in 1923
High school- top of her class, earning her a scholarship to Goucher College (1918, studied zoology and chemistry).
World War I- worked as a chemist at Hammersley Paper mIll, earned a scholarshiip to Yale University (1923, doctrates in biochem).
1937–38, as a Guggenheim fellow at the University of Uppsala, Sweden, she invented a means of isolating and purifying the active substance in tuberculin
Post doctoral research at University of Chicago Taught Pathology (Sprague Memorial Institute) and Biochem (UPENN's Henry Phipps Institute)
University of Uppsala (Sweden) 1937-38 as a Guggenheim fellow, invented technique to isolate and purify active substance in tuberculin----- protein substance from tuberculosis causing bacillus Myobacterium Tuberulosis Produced first purified protein derivative tuberculin, enabled first reliable tuberculin test
1941, US adopts as standard test 1952, World Health Organization adopts standard test
Still in Use today
1958- retired from teaching. Served as a consultant to the United States Public Health Service
1990- Inducted into National Women's Hall of Fame