Chemical Treatment
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Detailed treatment of chemical and stage digestion in grit precipitation chamber and clarifier. (CDC-5-158; 63 frames, synchronized disc, 7 minutes) Chestnut Blight U.S. Department of Agriculture, 1941. History of Chestnut Blight to 1940, symptoms, fungus, deterioration of blight-killer trees, and work of Bureau of Plant Industry to establish blight-resistant chestnuts. Revision
Complete catalog record
Series: Municipal Sewage Treatment Plants Series No. 2
Type: Filmstrip
Type: Filmstrip
Sources
- 3434 U.S. Government Films — title, year, creator, length, format, description, catalog record
Record added 2026-07-13 14:19:25