Portrait of Leonardo Da Vinci, one of the greatest of painters, sculptors, scientists and engineers. He left extraordinary drawings of significant physiological interest on muscle action, and on valve and hydraulic operations in the cardiovascular system.
Photograph of Dr. Arnold R. Rich operating with assistance of two others at Johns Hopkins Hospital. Signature: "Arnold R. Rich." The names of the other two men are written at the bottom of the photograph.
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.