Henry Stephens Washington
Washington, Henry Stephens
Born Jan. 15, 1867, in Newark, N.J.; died Jan. 7, 1934. American petrologist.
Washington graduated from Yale University in 1886. He conducted research in Greece, Asia Minor, Italy, Spain, Brazil, and the USA. In 1912 he began working at the geophysical laboratory of the Carnegie Institute in Washington, D.C. His major work deals with working out a method of the chemical analysis of rocks as well as a summary of the chemical analyses of igneous rocks. With others, Washington devised a classification of rocks according to chemical properties. In collaboration with F. Clark, he studied the problem of the distribution of chemical elements in the earth’s crust. He proposed one of the various schemes for dividing the earth’s surface into geochemical zones. Washington also proposed a hypothesis concerning the melting out of volcanic channels by gases and noted the dependence of the composition of the produced lavas on the location of a volcano.