Great scientists and their research are discussed including: Elmer V. McCollum and his discovery of vitamins A, D, and B1; John Boswell Whitehead and his work on dielectrics; Alexander Graham Christie's work on power plant design; the philosophy of George Boas applying the world of ancient Greece to modern thought; archaeology in the Near East by William Foxwell Albright; and Robert Williams Wood and his research into diffraction gratings and infrared filters. There is also a discussion of operations research and its applications in the American military effort.