This collection houses notebooks, charts, computer data sheets, correspondence, photos, reprints, and designs documenting Dr. Charles Congdon's research in radiation biology. There are also papers and research materials contributed by Egon Lorenz, Joanne Hollcroft, Arnold Van Pelt, C. Lowell Edwards, and T. Phillip Waalkes.

Because of the complexity of this collection the file order of the donor has been largely maintained.