Johnson ﾠ& ﾠJohnson pioneered the first prescription contraceptive gel
In 1931, Johnson ﾠ& ﾠJohnson pioneered family planning products with ORTHO-GYNOL, the first prescription contraceptive gel.
The electron microscope was invented
In 1931, the electron microscope was invented by Max Knoll and Ernst Ruska at the Berlin Technische Hochschule….
Baxter International was founded by Donald Baxter
In 1931, Drs. Ralph Falk and Don Baxter launched the Don Baxter Intravenous Products Corporation, the first commercial…
Drs. H Trendley Dean and Elias Elvove started work on the mystery of “mottled enamel” — later called fluorosis
In 1931, H. Trendley Dean and Elias Elvove started work on the mystery of “mottled enamel” — later…
scientists demonstrated Rocky Mountain spotted fever and endemic typhus was transmitted by rat fleas
In 1931, Rolla E. Dyer, Lucius F. Badger, and Adolph S. Rumreich demonstrated that Rocky Mountain spotted fever…
The Journal of Cancer Research became the American Journal of Cancer
In 1931, The Journal of Cancer Research (published quarterly from 1916-1930 became the American Journal of Cancer (published…
The etiology of ‘swine influenza’ was established
In 1931, Rockefeller Institute investigator Richard Shope published the first of three landmark papers that established the etiology…
The Cook County School of Nursing opened in the former Illinois Training School for Nurses
In 1931, The Cook County School of Nursing opened in the former Illinois Training School for Nurses, now…