Vestopal W: A Superior Embedding Medium for an Electron Microscope Study of Human Epidermis**From the Division of Dermatology (Francis W. Lynch M.D., Director) and Department of Anatomy, University of Minnesota Medical School, Minneapolis, Minnesota.Aided by research grants M-388 and B-782 from the National Institute of Mental Health and the National Institute of Neurological Diseases and Blindness, U. S. Public Health Service, and by the Graduate Medical Research Fund of the University of Minnesota.