The filtration of public water-supplies Third edition, revised and enlarged.

"The Filtration of Public Water-Supplies" by Allen Hazen is a book from the early 1900's that explores the importance of clean drinking water, especially for big cities, and talks about how filtering water can stop diseases like cholera. The author looks at how the United States and Europe were doing things differently with their water systems and explains the best ways to clean water using new tricks. It's a book to get people thinking about better water and how it keeps everyone healthy. The overall focus is on the important improvements possible through the use of filtration systems.