Osteology. Revised and largely rewritten for Third and Fourth Editions by peter thompson, M.D., Professor Of Anatomy, King's College, London; Member Of Anatomical Society Of Great Britain. This article was originally written by J. Bland Sutton, formerly Examiner in Anatomy in Royal College Of Sur geons. Articulations. By henry morris, am. And mb, London, President Of the Royal College Of Surgeons Of England; Consulting Surgeon to, and formerly Lecturer on Surgery and Anatomy at, Middlesex Hospital, London; and Examiner in Anatomy, University Of Durham, etc. Muscles. Rewritten by charles R. Bardeen, a.b., M.D., Professor Of Anatomy in the University Of Wisconsin; Member Association Of American Anato mists; Member of Editorial Board Of American Journal Of Anatomy. Originally written by the late J. N. C. Davies-colley, formerly Lecturer on Anatomy, Guy's Hospital, London. Heart, blood-vessels, and lymphatics. Revised and in part re written by florence R. Sabin, b.s., M.D., Associate Professor Of Anatomy in the Johns Hopkins University; Member Association of American Anatomists. The section on Blood-vessels was originally written by the late William J. Walsham, formerly Lecturer on Anatomy, St. Bartholomew's Hospital, London. The section on the Heart in previous editions was written by the late Arthur Hens man, and revised by Arthur Robinson, M.D., Professor of Anatomy, Uni versity Of Birmingham.