Christian James (C. J.) Lambertsen (1917-2011) worked as a professor of pharmacology, director of the Institute for Environmental Medicine, and the founding director of the Environmental Biomedical Stress Data Center in 1985 at the University of Pennsylvania's School of Medicine. He designed the Lambertsen Amphibious Respiratory Unit (LARU), which was the first widely used, closed-circuit Self-Contained Underwater Breathing Apparatus (SCUBA) in the United States. Types of materials include correspondence, reports, photographs, audio material, slides, lab books, lab data, experimental measures and procedures, diagrams, graphs, articles, manuscript drafts, grant proposals, newspaper clippings, and notes. Primary subjects include decompression, oxygenation, diving, decompression sickness, diving physiology, and underwater breathing apparatus. Materials range in date from 1930 to 2004.

This collection contains experiment documentation, research notes, scholarly writing, technical reports, publications, correspondence, and artifacts belonging to Christian James Lambertsen, primarily created during his tenure at the University of Pennsylvania. Primary subjects include decompression, oxygenation, diving, decompression sickness, diving physiology, and underwater breathing apparatus. Documentation from the University of Pennsylvania's Environmental Biomedical Stress Data Center and the Undersea and Hyperbaric Medical Society are also included. Numerous photographs, slides, films, and audio recordings are part of the collection, many of which need to be reformatted in order to be used. Materials range in date from 1930 to 2004, the bulk of the papers documenting Lambertsen's experiments are between 1970 and 1995.

Edward Lanphier (1922-1999) was a physician and senior scientist in the Department of Preventive Medicine at the University of Wisconsin--Madison. Lanphier wrote and spoke extensively on a variety of diving subjects, including decompression in surface-based diving, comfort in underwater exercise, animal and human respiration under increased pressures, and hyperbaric treatments. During his career, Lanphier was a member of the Undersea and Hyperbaric Medical Society. The collection contains his professional papers. Materials include correspondence, reports, committee materials, text of speeches and lectures, presentation notes, manuscript materials, research files, reprints, and grant files. Major subjects include diving, decompression, decompression sickness, diving physiology, and respiration. Materials range in date from 1876 to 1999, with the bulk of the materials dating from 1960 to 1999.

Contains the professional papers of Edward Lanphier. Types of materials include floppy disks, project proposals, correspondence, reference files, meeting minutes, slides, articles, grant proposal, financial records, site visits, and reports. Materials range in date from 1876 to 1999, with the bulk of the materials dating from 1960 to 1999.