The Engineer Field Manual. Office of the Chief of Engineers, U. S. A. Signal Book, U. S. Army. Office of Chief Signal Officer, U. S. A. The Slide Rule. Alexander. The Slide Rule. Clark. DEPARTMENT OF ORDNANCE AND GUNNERY FIRST CLASS The subject of ordnance and gunnery is studied by the cadets of the first class throughout the academic year. The course of instruction covers the principles involved in the construction and use of war material. It is broadly divided into three parts: the theoretical, the descriptive, and the practical. The theoretical part includes the study of the action of explosives, the study of interior and exterior ballistics, the theories of gun and carriage construction, and the principles of gunnery. The theoretical part of the course is not the same for all cadets, those showing the necessary proficiency taking a special course in the time devoted by the remainder of the class to review work. The descriptive part of the course covers the processes of manufacture of powders, guns, projectiles, and armor; and describes the small arms, cannon, machine and rapid-fire guns in use in the United States service, with the carriages, ammunition and accessory appliances required for their service. The department is well supplied with models, which are used in conjunction with the text. The practical part of the course covers the operation of machines and appliances used in the fabrication of modern ordnance, the latter work being in effect a short but valuable course in manual training. In connection with the course, visits are made to Watervliet Arsenal, where the process of gun construction is observed, and to the Ordnance Proving Ground at Sandy Hook, where actual firings from the several classes of guns are observed, including usually one or more shots against armor, and where the latest developments in war material are seen. TEXTBOOKS Ordnance and Gunnery. Lissak. Exterior Ballistics. O’Hern. Stresses in Wire-Wrapped Guns and in Gun Carriages. Ruggles. BOOKS OF REFERENCE Ballistic Tables. Ingalls. Mathematical Tables. Newcomb. Publications of Ordnance Department. U. S. Army. DEPARTMENT OF MILITARY HYGIENE THIRD CLASS The course in military hygiene begins with the second academic year and consists of 13 recitations and 6 demonstrations. The textbook used is Keefer’s _Military Hygiene_; the instruction covers the essentials in the care of troops from the point of view of the line officer, particular attention being given to personal hygiene, transmissible diseases, post and camp sanitation, clothing, and the effects of alcohol and other narcotics. Practical demonstration in the field is given of the methods of construction and operation of the various camp sanitary appliances such as latrines, water sterilizers, incinerators, etc.