The Department of Mineral Sciences was created in 1963 as part of a reorganization in the National Museum of Natural History. At that time the Department of Geology was divided into two new departments, with the Division of Mineralogy and Petrology becoming the Department of Mineral Sciences and the Divisions of Invertebrate Paleontology and Paleobotany and Vertebrate Paleontology joined to form the Department of Paleobiology. George S. Switzer become the first chairman of the Department of Mineral Sciences in 1963 and served until 1968. Other incumbents included Brian H. Mason, 1968-1973; and William G. Melson, 1973-1978. Staff of the Division of Mineralogy and Petrology included William F. Foshag, assistant curator, 1919-1929, curator, 1929-1948, and acting curator, 1948-1956; Edward P. Henderson, associate curator, 1942-1963 (Henderson also served as assistant curator in the Division of Physical and Chemical Geology from 1929 to 1942); George S. Switzer, associate curator, 1948-1956, acting curator, 1957, and curator, 1958-1963; Paul E. Desautels, associate curator, 1957-1963; and Roy S. Clarke, Jr., chemist, 1957-1963. In 1963 Henderson and Clarke were assigned to the Division of Meteorites, and Desautels to the Division of Mineralogy. Therefore, after 1963, they are not represented in this correspondence.