Frank Erhart Emmanuel Germann through eight editions between 1938 and 1985. His most influential textbook was "College Chemistry" (Englewood Cliffs, New Jersey: Prentice-Hall, 1952, 1958, 1965). A popular trimmed version was "Essentials of College Chemistry" (Prentice-Hall, 1960). Charles Franklin Metz, another Germann graduate student (M.S. 1928, Ph.D. 1936), was one of the twelve scientists who conducted the world’s first firing of a nuclear weapon, the “Trinity” test on New Mexico’s Alamogordo Bombing and Gunnery Range on Monday, July 16, 1945. On Monday, August 6, 1945, a nuclear bomb was detonated over Hiroshima, Japan. Later that week, on Thursday, August 9, 1945, a nuclear bomb
Mark 12 nuclear bomb Mark 12 nuclear bomb The Mark-12 nuclear bomb was a lightweight nuclear bomb designed and manufactured by the United States which was built starting in 1954 and which saw service from then until 1962. The Mark-12 was notable for being significantly smaller in both size and weight compared to prior implosion-type nuclear weapons. For example, the overall diameter was only , compared to the immediately prior Mark-7 which had a diameter, and the volume of the implosion assembly was only 40% the size of the Mark-7's. There was a planned W-12 warhead variant which would have been used with the