As the _Leviathan_ transported nearly one hundred and twenty thousand men to Europe during the war, and has brought back nearly as many since, it requires no active imagination to realize that the medical department has had its hands full. The percentage of sickness bound to occur among thirteen thousand men was enough to keep nine doctors busy, and this was only a small part of their work. Sanitation on such a huge ship was in itself a problem. Samples of food and water had to be examined and accepted or rejected; troop compartments and every nook and corner of the ship were inspected daily and a high sanitary standard maintained; quotative examinations of the air in the troop spaces were made at different hours both day and night to determine the temperature, humidity, and amount of carbon dioxide in these places; these observations were made the subjects of various reports and resulted in the installation of new ventilating systems and correction of those already in operation; during threatened epidemics of infectious diseases it was often necessary to take cultures and do other laboratory work among hundreds of men. In July, 1918, the _Leviathan_ began transporting wounded men and has carried a large number of them to date. The wounded required much attention and the manner in which they have been cared for on board this vessel reflects great credit upon the medical department. A new departure for ships of war was the Nurse Corps. The corps consists of Mary M. Robinson, Head Nurse, U. S. N., Irene Reed, U. S. N., Charlotte F. Hyde, U. S. N., Ruby F. Nutling, U. S. N. R. F., Ruby Russell, U. S. N. R. F., Madelon Stowell, U. S. N. R. F., Alice B. Newcomb, U. S. N. R. F., Vera O. Harmon, U. S. N., Mary A. O’Neill, U. S. N. R. F. These were the first nurses who ever had duty on a man-o’-war. Their duties have been supervisory over the hospital corps, and their training and experience as nurses have made them of invaluable assistance. THE INFLUENZA EPIDEMIC The following are extracts from reports of the influenza epidemic submitted to commanding officer by Lieut. Com. H. A. May, M. C., October 11th, 1918: There were 260 officers and 8,873 enlisted men of all grades reported as present when the ship left the dock in Hoboken. These made up the personnel of several organizations—the 323d Field Signal Corps, the 401st, 467th and 468th Engineers, the 302d Water Tank Train, a September Automatic Replacement Draft, the 57th Pioneer Infantry, and the 73d Medical Replacement Section. In addition, there were 191 members of the 60th and 62d units, Army Nurse Corps.