Annual report, 1951

The series contains unpublished annual reports produced by Walter Lawrance for the National Council for Stream Improvement Inc. describing the results of several research projects. The reports contain information about benthal deposits in the Androscoggin River; the microbial utilization of nutrients in the river under aerobic and anaerobic conditions; the time of passage of pollution from Berlin, N.H. to Lisbon Falls, Maine; suspended solids entering and leaving the pond; and hydrogen sulfide production in the water. Lawrance was assisted in his research by a number of people, including William H. Sawyer, Jr., who did bacteriological research, Donald A. Campbell, and Richard M. Briggs. Each report was also distributed to the three major paper mills.