Van H. Manning or Vannoy Hartrog Manning (1861 – July 13, 1932) was the 2nd director of the U.S. Bureau of Mines and was instrumental in developing chemical warfare defense technologies during World War I.
Van H. Manning or Vannoy Hartrog Manning (1861 – July 13, 1932) was the 2nd director of the U.S. Bureau of Mines and was instrumental in developing chemical warfare defense technologies during World War I. (en)