During the week beginning next Monday, Dr. Thomas Lewis, assistant physician and lecturer on Cardiac Pathology in the University College Hospital of London, and an editor of "Heart," an important medical journal, will come to Boston as visiting physician, pro tem., at the Peter Bent Brigham Hospital and visiting lecturer in Medicine at the University. This practice was inaugurated last year when Dr. William S. Thayer, of Johns Hopkins, spent a week here as visiting physician. The local scheme of instruction thus acquires the services of distinguished men who give various student exercises and afford the Medical School men an opportunity to learn the methods of leaders from other places. Dr. Lewis is a pioneer in the newer methods of studying the heart and is one of the greatest authorities on Cardiac function.