The upper view shows the site as it appeared Oct. 24, 1917. The lower view shows the same as it appeared nine months later.] Some idea of the extent of the work may be gained from the following facts. On October 1, 1918, there were 233 officers, 6,948 enlisted men and 3,066 civilians engaged in work at Edgewood. 86 cantonments were built, accommodating about 8,500 men, while the five officers’ barracks provided accommodations for 290. The completed hospital unit consisted of 34 buildings, accommodating 420 patients under ordinary conditions. The total number of buildings erected on the Arsenal grounds was 550. 14.8 miles of improved roads were built, and 21 miles of standard gauge and 15 miles of narrow gauge railway. A system furnishing 9.5 million gallons of salt water and another furnishing two millions of fresh water daily were successfully installed. Large power plants were built in connection with the shell filling plants and the chlorine plant. Plants for phosgene, chloropicrin, mustard gas, chlorine and sulfur chloride were built and placed in successful operation. Most of the raw materials, with the exception of sulfur chloride, were obtained from commercial firms. The other gases and manufactured materials used, such as phosphorus, tin and silicon tetrachlorides, bromobenzylcyanide and arsenic derivatives were supplied by various plants scattered through the East and Middle West States. The raw materials used by the Arsenal in 1918 were as follows: Salt 17,358,000 pounds Bleach 42,384,000 “ Picric acid 3,718,000 “ Alcohol 3,718,000 “ Sulfur 24,912,000 “ Sulfur chloride 6,624,000 “ Bromine 238,000 “ Benzyl chloride 26,000 “ The production of toxic materials and the amount shipped overseas in bulk follow: -----------------------+-------------+------------- | Production, | Shipped in | Pounds | Bulk, Pounds -----------------------+-------------+------------- Chlorine: | | Liquid | 5,446,000 | 2,976,000 Gaseous | 2,208,000 | Chloropicrin | 5,552,000 | 3,806,000 Phosgene | 3,233,070 | 840,000 Mustard gas | 1,422,000 | 380,000 Bromobenzyl cyanide | 10,000 | White phosphorus | 2,012,000 | 342,000 Tin tetrachloride | 2,012,000 | 212,000 Titanium tetrachloride | 362,000 | -----------------------+-------------+-------------