Book Review Chronic Rheumatic Diseases. Their Diagnosis and Treatment . By F. G. Thomson, M.A. Cantab., M.D., R.F.C.P. Lond., Physician to the Royal United Hospital, Bath; Consulting Physician to the Royal Mineral Water Hospital, Bath, etc., and R. G. Gordon, M.D., D.Sc., M.R.C.P. Edin., Physician to the Royal Mineral Water Hospital, Bath; Physician to the Children's Orthopaedic Hospital, Bath; Assistant