Mary Alyce Luschen Krohnke, a senior at Grinnell College, Grinnell, Iowa, has completed a semester of study, work, and research at Argonne National Laboratory, Argonne, Ill. She was one of a group of 11 outstanding seniors from Associated Colleges of the Midwest who came to Argonne in the fall of 1961. Here she is shown in an Argonne biology laboratory studying chromosome smears of irradiated cells. (Photo and caption credit to Argonne National Laboratory)
