The new and unused materials acquired before the industry could be terminated were disposed of in various ways. Adequate war reserves of supplies were placed in safe storage. During the war the Signal Corps had built up a large training school at Camp Alfred Vail in New Jersey. This camp has been retained as a permanent adjunct to the Signal Corps. To the warehouses of Camp Vail were sent large quantities of surplus signal corps supplies, both finished articles and partially manufactured apparatus, there to be studied and developed in the laboratories of the camp. The Post Office Department took a certain amount of radio telephone and telegraph apparatus for use on its mail planes. The Forest Service took radio and also some of the homing pigeons for use in its fire-protection service in the national forests. Other supplies were sold to the public. The Signal Corps, as one of its duties, created and compiled a photographic history of America’s participation in the World War, both in motion pictures and in “still” views. The hundreds of thousands of negatives in this history were collected in Washington after the armistice and stored in a specially constructed building which is not only fireproof, but which provides air of uniform temperature and dryness, to prevent rapid deterioration of the negatives. A complete catalogue of views was prepared, and the sale of duplicates to the public was authorized. Many of the illustrations in these volumes are taken from that collection.