Harold F. Blum

Harold Francis Blum (1899 - 1980) was a physiologist who explored the interaction of light and chemicals on cells, especially sunlight-induced skin cancer.

Blum completed postdoctoral studies at the Laboratoire Maritime de Concarneau in France and the University of Liège in Belgium in 1933.

[1][2] Harold Blum was an assistant professor of animal biology at the University of Oregon, then an instructor of physiology at Harvard Medical School.

Blum's 1940 book Photodynamic Action and Diseases Due to Light, written during the first of his three Guggenheim Fellowships (awarded in 1936, 1945, and 1953), was a classic text used in medical schools for many years.

"[4] Blum argues that evolution followed specific patterns predetermined by the inorganic nature of the earth and its thermodynamic processes.