This collection of papers by William Ripley Nichols covers a range of topics related to water supply, including water quality, treatment methods, and distribution systems. As a leading expert in the field of water supply, Nichols provides valuable insights and practical advice for engineers, public health officials, and others involved in managing this vital resource. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.