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Bell, H. D., 1927.—“Research on the Composition of the Grey Slimy Growth on the Surface of Sewage Filters.” Surveyor Lond., LXX, 561–565. (W.L. 20782.)
Buswell, A. M., 1928.—“The Chemistry of Water and Sewage Treatment.” 1–362. (New York.)
Clark, W. M., 1925.—“The Determination of Hydrogen Ions.” 1–480, 2nd Edit. (Baltimore.)
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Enslow, L. H., 1927.—“Recent Developments in Sewage Chlorination,” from “Fly Nuisance and Filter Pooling.” (Texas.)
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Greer, F. E., 1926.—“Anaerobes in Sewage.” Amer. J. Publ. Hlth., XVI, 500–501. (W.L. 617.)
Heukelekian, H., 1927.—“The Fate of B. coli and B. aerogenes in Sewage Purification.” J. Bact., XIV, 55–67. (W.L. 11056.)
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Peters, B. G., 1928.—“Some Nematodes of a Sewage-disposal Plant,” an otherwise unpublished section of a Thesis, “Saprophytic Eelworms,” submitted to the University of London, 20 pp.
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Purdy, W. C., 1926.—“The Biology of Polluted Water.” J. Amer. Wat. Wks. Ass., XVI, 45–54. (W.L. 11023.)
Purvis, J. E., 1926.—“The Influence of Hard and of Soft Waters on the Decomposition of Sewage.” Surveyor Lond., LXIX, 277–278.
Rothamsted Experimental Station, 1927.—“Abridged Report for 1925 and 1926.” pp. 39 and 40.
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