In Vivo Effects of Laser Radiation on the Skin of the Syrian Hamster*†*From the Department of Electrical Engineering, Northeastern University, Boston, Mass., the Department of Dermatology, Roswell Park Memorial Institute, Buffalo, N.Y., and the Children's Cancer Research Foundation, the Children's Medical Center, and the Department of Pathology, Harvard Medical School, Boston, Mass.†The laser used in these studies was provided through the cooperation of Dr. O. W. Richards and Mr. G. A. Granitsas of the Research Department of the American Optical Company, Southbridge, Mass.