This collection houses research, notes, articles, reports, memos, photographs, and negatives documenting Harry D. Youmans Jr.'s education and professional work. The notes show both Youmans' college and professional career and include class notes and research for various articles. Many of the reports and memos were written during Youmans' time at the Bureau of Radiological Health (which was a part of the Food and Drug Administration) and discuss such topics as the effects of radiation and X-Ray therapy and the operation of various types of X-Ray medical equipment (including reports on specific hospitals). The collection of photographs and negatives includes numerous images of the equipment that Youmans discusses in his reports.