This joint discussion is dedicated to the memory of Sir Arthur Eddington who was born 100 years ago. He laid the foundation of much work on stellar evolution, which was summed up in his book The Internal Constitution of the Stars (ICS) which appeared in 1926. Although he did no substantial work on mass loss from stars, the possibility of mass loss is mentioned in several places in ICS and I shall mention these and other aspects of Eddington’s work which are relevant to our present interest.