Bulletin Of The Southern California Academy Of Sciences 1902 Classic Reprint

Author : Southern California Academy of Sciences
Publisher : Forgotten Books
ISBN 13 : 9780332891514
Total Pages : 76 pages
Book Rating : 4.8/5 (915 download)

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Download or read book Bulletin of the Southern California Academy of Sciences, Vol. 5 written by Southern California Academy of Sciences and published by Forgotten Books. This book was released on 2017-12-15 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Bulletin of the Southern California Academy of Sciences, Vol. 5: March, 1906 The location of nearly every town of importance in Southern California was originally planned by the old mission fathers in relation to the possibility of its water supply. The most im portant missions were built in those districts where water was found in largest amount. At these old missions one may see, even today, evidences of a high degree of engineering Skill possessed by these people in planning Ithe ditches and reservoirs. A reference to the map Shows that the San Gabriel and Los Angeles rivers carry the water from the mountains toward the sea, and although not rising directly in the high ranges of the Sierra Madre mountains, at least a large part of the rain and snow finds its way into these two streams, through the under ground washes with which the San Fernando and San Gabriel valleys are filled. The San Gabriel river is different from the Los Angeles river in that it has a perennial flow from the mountains in which it originates and is less affected by seasons of drouth. The peculiar geological structure of the washes referred to shows they are made up of sand and gravel with the bed rock between 200 and 300 feet below the sea level. These immense subterranean filter galleries as we may speak of them, make the character of our water supply one of the most ideal as far as bacteria] invasion is concerned. If it were possible to bring this water filtered through its beds of sand, gravel and alluvial debris directly into 0111 city mains then our water supply would be most ideal in quality. 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.