One point relating to the casualties resulting from the work should perhaps be mentioned here. The number of casualties should change the mind of anyone who feels that men chose this work as being “safe” instead of going to France. During the six months from June to December there were 925 casualties, of which three were fatal, two being due to phosgene and one to mustard gas. These were divided among the different gases as follows:
| Mustard gas | 674 |
| Stannic chloride | 50 |
| Phosgene | 50 |
| Chloropicrin | 44 |
| Chlorine | 62 |
| Other material | 45 |
Of these 279 occurred during August, 197 during September and 293 during October. Since production stopped early in November, there were only 14 during that month and three during December.
The Staff at Edgewood Arsenal at the signing of the Armistice was as follows:
| Commanding Officer | Colonel Wm. H. Walker | |
| Administrative Officers |  | Lt. Colonel George Cahoon, Jr. |
| Lt. Col. Edward M. Ellicott | ||
| Lt. Col. Wm. C. Gallowhur | ||
| In Charge of Outside Plants |  | Lt. Col. Wm. McPherson |
| Major Adrian Nagelvoort | ||
| Major Charles R. Wraith | ||
| Captain John D. Rue | ||
| Shell Filling Plant | Lt. Col. Edwin M. Chance | |
| Chlorine Plant | Lt. Col. Charles Vaughn | |
| Chemical Plants | Major Dana J. Demorest | |
| Chemical Laboratory | Major William L. Evans | |
As the work of the Arsenal expanded it was necessary to manufacture certain of the chemicals at outside plants. The men in charge of these plants were:
| Bound Brook, N. J. | Lt. William R. Chappell |
| Stamford, Conn. | Lt. V. E. Fishburn |
| Hastings-on-Hudson, N. Y. | Major F. G. Zinnsser |
| Niagara Falls, N. Y. | Major A. Nagelvoort |
| Buffalo, N. Y. | Lt. A. W. Davison |
| Kingsport, Tenn. | Lt. E. M. Hayden |
| Charleston, W. Va. | Lt. M. R. Hoyt |
| Midland, Mich. | Major M. G. Donk |
| Croyland, Pa. | Capt. A. S. Hulburt |
After the Armistice, Edgewood Arsenal was selected as the logical home of the Chemical Warfare Service, and all the outside activities of the Service were gradually closed up and the physical property and files moved to Edgewood. At first the command of the Arsenal was in the hands of Lt. Col. Fries, but when he was appointed Chief of the Service, Major E. J. Atkisson, who had so successfully commanded the First Gas Regiment, A. E. F., was happily chosen his successor. At the present time (July 1, 1921), the organization of Edgewood Arsenal is as follows:
| Commanding Officer | Major E. J. Atkisson |
| Executive Officer | Major R. C. Ditto |
| Technical Director | Dr. J. E. Mills |
| Chemical Division | Mr. D. B. Bradner |
| Mechanical Division | Mr. S. P. Johnson |
| Plant Division | Capt. E. G. Thompson |
| Chemical Warfare School | Major O. R. Meredith |
| Property | Major A. M. Heritage |
| First Gas Regiment | Major C. W. Mason |
| Mask Production Division | Lt. L. A. Elliott |
| Medical Department | Major T. L. Gore |
| Pathological Division | Lt. H. A. Kuhn |
| Quartermaster Department | Capt. H. L. Hudson |
| Finance Department | Capt. C. R. Insley |