Figure 1. Photograph of a group of researchers who attended a symposium on Dental Caries held in Pittsburgh, PA, on June 23, 1932, under the auspices of the local Section of the IADR. From left to right: Dr. John Enright, Mellon Institute; Dr. Theodor Rosebury, Columbia University; Major F.E. Rodriguez, Ann Arbor, MI; Dr. Russell Bunting, University of Michigan; Dr. William Gies, Columbia University; Dr. Edward Hatton, Northwestern University; Dr. H.E. Friesell, University of Pittsburgh; and Dr. Philip Jay, University of Michigan.