Excerpt from The Examination of Waters and Water Supplies In this edition various sections have been amplified, one or two almost entirely re-written, and two additional ones added. Extended experience has enabled me to write with increased confidence of the modes of procedure and methods of analysis recommended, and, whilst the opinions of others may be freely quoted, everything recommended is based upon personal experience. The edition has had to be revised at a time when my leisure was very limited, and considerable intervals have, on occasions, elapsed between the revision of one section and another, and it is possible that a little repetition may have resulted. If such is found to be the case, it will probably be in connection with some point which I have thought it desirable especially to emphasise, and may therefore need no excuse. Many persons who have found the book useful have kindly sent mo suggestions. These have all been carefully considered; but the majority are not referred to, as they were either not germane to the subject or did not appear to be of any practical use. My one endeavour has been to make the work as practical and useful as possible. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.