Group photograph of the first graduates. of Johns Hopkins. Included are: Front Row: (sitting on floor) No. 1, William MacCallum; Second Row: No. 4, Dr. William H. Welch; No. 5, Louis P. Hamburger; Back Row: No. 5, Thomas R. Brown.
Photograph of the inside of a hyperbaric unit. Two staff members (a female and a male) are standing inside the unit. The door of the unit is open. Photographed by Thad W. Sparks, Duke University Photographer.