Technician and assistant working on the Cyclotron, St. Louis, Missouri, 1945
Photograph. Technician (kneeling) and assistant working on large physical research machine called the Cyclotron. Official Caption: "This picture shows the Cyclotron, a complicated apparatus for physical research, which looks more like a big industrial machine. Here a technician (kneeling) and an assistant make the final adjustments of the Cyclotron before exposing the red phosphorus paste to deuteron rays to make it radioactive. The cyclotron was built in an underground room to protect passers-by from being inadvertently exposed to the harmful radiation. (6533-B).St. Louis, Missouri, United States. 1945
See also: 2012.019.470/6533A, .479/6533E, .589/6533D, .614/6533F, .623/6533C
Also refer to in this collection: 6533 are three different series of photos. 6533-# (up to number 8) and another series, identified by letters early in the alphabet about the Cyclotron and other things. Then a third series of two photos, 6533T (.619) and an unknown other.