Drs. Richard A. Finkelstein and Joseph LoSpalluto in their laboritory. This photograph has the following label on the reverse: “A vial containing concentrated cholera toxin is examined by Drs. Richard A. Finkelstein (left) and Joseph LoSpalluto of the University of Texas Southwestern Medical School. The two scientists developed a complex process for isolating and purifying the disease causing material, helping pave the way for improved vaccine against cholera.”