Sewerage and Sewage Treatment

by Harold E. Babbitt

[175]. For mechanical methods of drying sludge, see Reference 22, p. 1127, and No. 33, p. 843.

[176]. Reference 10.

[177]. Reference 13.

[178]. University of California, Bulletin 251, 1915.

[179]. Reference 25.

[180]. See Report by Black & Phelps of Metropolitan Sewerage Commission, 1911, reprinted as Vol. VII of Contributions from the Sanitary Research Laboratory of the Massachusetts Institute of Technology.

[181]. See Reports, Mass. State Board of Health.

[182]. Reference 47.

[183]. Reference 10.

[184]. Reference 10.