Prior to the present war, this unit was designated a hospital; but the nomenclature was altered to casualty clearing station soon after the commencement of the present campaign. The unit corresponds, more or less closely, in organization, establishment and function to the evacuation hospital of the United States Army. The following remarks apply to the casualty clearing station of the British Army, and may possibly be found of service to officers doing duty with an evacuation hospital of the United States Army. Establishment. —This consists of a lieutenant-colonel, R. A. M. C., in command of the unit; six other medical officers; one quartermaster; eight sergeants; seven corporals, and sixty-two privates. Attached. —There are three chaplains, one interpreter and six Ambulance Service Corps drivers (mechanical transport). Transport. —This consists of three 3-ton lorries. The sergeants are allotted for duties as follows: nursing duties, 2; steward, 1; dispenser, 1; cook, 1;