Chemistry of Bowen's Disease: Relationship to Arsenic11From the Skin and Cancer Hospital of Philadelphia, Unit of the Department of Dermatology, Temple University Medical Center, Philadelphia, Penna., and the Armed Forces Institute of Pathology, Washington, D.C.Associate Professor of Dermatology and Associate Professor of Dermal Pathology, Temple University Medical Center, and Director of Laboratory, The Skin and Cancer Hospital of Philadelphia (Dr. Graham); Research Associate and Biochemist, Skin and Cancer Hospital of Philadelphia (Dr. Mazzanti); Chief, Department of Pathology and Branch of Dermal Pathology, Armed Forces Institute of Pathology (Dr. Helwig).This investigation was supported in part by a research grant, No. C-4275 (C1C2), from the National Cancer Institute, Public Health Service, Bethesda 14, Md.Presented at the twenty-second Annual Meeting of The Society for Investigative Dermatology, New York, N.Y, June 27, 1961.