Because of the formation of the Chemical Warfare Service and the apparent need for officers, the office was soon flooded with applications for commissions. These were carefully examined and the men were sent first, by courtesy of the Chief of Engineers, to Camp Humphreys for a month’s course of military training. At the end of this period they were sent to Camp Kendrick as students of the Army Gas School. Toward the last of October all the officers and enlisted men were transferred to Camp Kendrick where an Officers’ Training Battalion was organized. It is obvious that the gas training of troops was the most responsible duty of the Training Division. There was constantly in mind an ideal of supervised and standardized training for all troops in the United States, and the Division, at the time of the Armistice, for the first time found itself with a nearly adequate corps of officers through whom this ideal could be realized. MEDICAL DIVISION Dr. Yandell Henderson of Yale University was the logical man to inaugurate the medical work of the Bureau of Mines, because of his experience with oxygen rescue apparatus. A member of the first committee of the Bureau, he secured, in July, 1917, an appropriation for the study of toxic gases at Yale. This was in charge of Doctors Underhill, therapy; Marshall, pharmacology; and Winternitz, pathology. When the American University Station was opened Marshall was given charge of the pharmacology. About the same time a factory protection unit was organized under the direction of Doctors Bradley, Eyster and Loevenhart. At first this committee reported to the Ordnance Department, but later the work was transferred to the Gas Defense Service.