Abstract
THE nature and effects of ultra-violet radiation constitute a study of increasing practical importance, so that, in the interests of patients, whether human or lower animal, subjected to this form of radiant energy, it behoves us to proceed with caution, and to analyse with the greatest care the principles upon which this method of treatment rests.
Let us at once frankly admit that such principles are still based on slender supports. What little we do know is mainly due on the part of applied science to the well-known observations of Professor Leonard Hill and of his co-workers in this country, as well as to Professor Carl Sonne and his well-known predecessors, Finsen, Reyn, Ernst and others of the Danish school. On the clinical side, Sir Henry Gauvain, Dr. Howard Humphris, Dr. Kerr Russell, Dr. Percy Hall, and others in this country, have published the results of their practical experience, while abroad useful references are to be found in American, French and German literature.