 Both papers appeared in the same issue of the "Journal of Biological Chemistry" in 1913.This turned out to be a very close call given that learning about vitaminA took scientists about 130 years, beginning with François Magendie in 1816 through its synthesis in 1947.Davis published with McCollum from 1909 to 1916, and Nina Simmonds did the same from 1916 to 1929.