Excerpt from A Study of the Normal Constituents of the Potable Water of the San Francisco Peninsula The object in view has been to determine, for the region selected, just what are the normal constituents of the potable water supplies at different seasons of the year from the sanitary point of view, so that when in the future the purity of a certain supply is in question, data may be at hand which will be of fundamental importance in reaching a correct conclusion) 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.