Sewerage and Sewage Treatment, by Harold Eaton Babbitt 61773 [Link: http://www.gutenberg.org/6/1/7/7/61773 ] [Files: 61773-0.txt; 61773-h.htm] Thanks to Richard Tonsing and the Online Distributed Proofreading Team at https://www.pgdp.net (This file was produced from images generously made available by The Internet Archive) David