Includes the office files as well as the personal papers of physicist J. Howard Dellinger whose career as a government scientist in the National Bureau of Standards spanned over a half century. The office files, containing minutes of and other materials concerning official and professional meetings, reports, correspondence, a diary, and scientific papers, 1906-1948, cover Dellinger's years at the Bureau as physicist (1907-1919), his years as Chief of the Radio Section (1919-1946), Chief of the Central Radio Propagation Laboratory (1946-1948); also minutes of and other materials concerning offical and professional meetings, reports, correspondence, a diary, and scientific papers, 1906-1948. The personal records (1907-1962) consist of correspondence, reports, professional papers, copies of speeches, and other materials relating to Dellinger's professional and official activities and, to a less extent, his personal affairs.