ION PICTURES 183

28 Geographical location of sulphur deposits; Frasch method of recovering sulphur deposits in salt domes; collecting stations' and storage vats; cooling, drill- For ing, weighing, loading, and blasting, title distribution for various uses. Silent b&w) same also version, title, available. (20 28 minutes, color) 1943. Sulphur ng U.S. Bureau of Mines in cooperation best with Texas Gulf Sulphur Co., Inc., 1930. Geological location of sulphur deposits; Frasch method of recovering sulphur deposits in salt domes; collecting stations and storage vats; cooling, drilling, blast- 41 ing, weighing, loading, and distribution for various uses. Sound color revision, same title, also available, c-