The Activated Sludge Process

THIS book may be described as an amplification and bringing up-to-date of the paper read by Mr. Martin before the Institution of Civil Engineers a few years ago, in which he brought together established facts and results contained in a great number of scattered papers dealing with the subject of the activated sludge process.The Activated Sludge Process.By Arthur J. Martin (Reconstructive Technical Series.) Pp. xiv + 415 + 37 plates. (London: Macdonald and Evans, 1927.) 30s. net.