The most conspicuous intelligence work done along these lines was by Lieutenant Colonel J. E. Zanetti, who was made Chemical Warfare liaison officer with the French in October, 1917. He gathered together and forwarded through the Headquarters of the Chemical Warfare Service to the United States more information concerning foreign gases, and foreign methods of manufacturing and handling them, than was sent from all other sources combined. By his personality, energy and industry he obtained the complete confidence of the French and British. This confidence was of the utmost importance in enabling him to get information which could have been obtained in no other way. Suffice to say that in the 13 months he was liaison officer with the French during the war, he prepared over 750 reports, some of them very technical and of great length. As a whole, the Intelligence Division was one of the most successful parts of the Chemical Warfare Service. Starting 2½ years after the British and French, the weekly bulletin and occasional papers sent out by the Chemical Warfare Service on chemical warfare matters came to be looked upon as the best available source for chemical warfare information, not alone by our own troops but also by the British. MEDICAL The Medical Section of the Chemical Warfare Service was composed of officers of the Medical Department of the Army attached to the Chemical Warfare Service. These were in addition to others who worked as an integral part of the Chemical Warfare Service, either at the laboratory or on the experimental field in carrying out experiments on animals to determine the effectiveness of the gases. The Medical Section was important for the reason that it formed the connecting link between the Chemical Warfare Service and the Medical Department. Through this Section, the Medical Department was enabled to know the kinds of gases that would probably be handled, both by our own troops and by the enemy, and their probable physiological effects. Colonel H. L. Gilchrist, Medical Department, was the head of this Section. It was through his efforts that the Medical Department realized in time the size of the problem that it had to encounter in caring for gas patients. Indeed, records of the war showed that out of 224,089 men, exclusive of Marines, admitted to the hospitals in France, 70,552 were suffering from gas alone. These men received a total of 266,112 wounds, of which 88,980, or 33.4 per cent, were gas. Thus ⅓ of all wounds received by men admitted to the hospital were gas. While the records show that the gas cases did not remain on the average in the hospitals quite as long as in the case of other classes of wounds, yet gas cases became one of the most important features of the Medical Department’s work in the field.