Clair Sawyer The late Clair N. Sawyer was active in the field of Sanitary Chemistry for over 30 years. He was received a Ph.D. from the University of Wisconsin. As Professor of Sanitary Chemistry at the Massachusetts Institute of Technology, he taught and dircted research until 1958. He then was appointed Vice President and Director of Research at Metcalf and Eddy, Inc., and served as a consultant on numerous water and waste-water treatment projects in the United States and many foreign countries. After retiring, he served as an environmental consultant for several years. He passed away in 1992. He was the originator and sole author of the first edition, which published in 1960. Read More Read Less