[posted] Posted (#69025, Hazen) !

[ajhaines]

The filtration of public water-supplies, by Allen Hazen                69025
  [Subtitle: Third edition, revised and enlarged.]
  [Author: Allen Hazen]
  [Link: https://www.gutenberg.org/6/9/0/2/69025]
  [Files: 69025-0.txt; 69025-h.htm]

Thanks to Charlene Taylor, Brian G. Wilcox and the Online Distributed
Proofreading Team at https://www.pgdp.net (This file was produced from
images generously made available by The Internet Archive/American
Libraries.)

Regards,
Al