The Second Cogwheel Report on the Organization of Medical Work in Hospitals reaffirms the need for this type of organization in the impending reunification of the Health Service and describes the functioning of such systems since the First Report. The Divisional structure, with a small Executive Committee composed of representatives from each specialty division, is described again. There is emphasis on the Executive rather than Advisory functions of the Executive Committee, and the need is stressed for Divisional representatives and Chairmen of Executive Committees to be vested with responsibility and authority by their colleagues to take decisions on their behalf. Mention is made of the development of psychiatric Divisional Structures in psychiatric Groups, based on teams serving particular areas of population, and it seems obvious that these should be linked with Cogwheel systems of related general groups. We would only comment that the psychiatric consultant staffs, based traditionally on the psychiatric hospitals and now reaching out to units in district general hospitals, have always functioned as a clear-cut division in the Cogwheel sense, organizing, planning, advising and coordinating in their multi-disciplinary style. Other specialties have tended to organize and function more on a Hospital Staff Committee level without the advantages of the specialty division. The new advantage of Cogwheel for psychiatry seems to lie 8 in its association with other specialties at Executive Committee level.