Identifier: scienceforbeginn00barb (find matches)
Title: Science for beginners
Year: 1921 (1920s)
Authors: Barber, Frederic Delos, 1868- Fuller, Merton Leonard, 1872- joint author Pricer, John Lossen, 1871-1920, joint author Adams, Howard William, 1875- joint author
Subjects: Science
Publisher: New York, H. Holt and Company
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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ers or lakes containing fresh and wholesomewater. If the natural water supply was not sufficient, greataqueducts were built to bring a supply from a distance andhuge reservoirs were constructed to store a supply in timesof plenty. Some of the greatest structures erected by an-cient man were these great stone aqueducts and reservoirs(Fig. 239). . Recognizing their dependence upon water, campers andhunters always make camp, when possible, near some springor stream. For a similar reason the earliest settlers of the 404 THE VALUE OF WATER 405 Mississippi valley and of the great plains to the west settledfirst upon the lands bordering the streams. When all of theland bordering the streams was taken and the settler wasobliged to take land farther back, the first improvement hemade was to dig a well, for he mnst have water. 481. Water Valuable for Purposes Other Than Drinking.—Streams and other bodies of water have always been thehighways for commerce. Until the invention of the locomotive
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Fig. 239.—Aqueduct of Segovia, Spain. Nearly one-half mile in length.Over 1800 years old. From History of Sanitation, Cosgrove. and the perfection of the modern railroad, which have takenplace within the last century, the means of transportation byland were very poor and costly; in fact, there had beenscarcely any improvement in modes-of travel since the dawnof history. The ox and the horse were but little improve-ment over the equally rapid-moving camel, which was thebeast of burden in the earliest Biblical times. For this reasonpractically all of the worlds commerce up to about a half-century ago was carried on by water. 406 WATER SUPPLY AND SEWAGE DISPOSAL For centuries, man has used the power of running water tohelp him perform his labor. It has ground his corn andwheat; it has sawed his lumber and run his looms when noother force was available. Plant life as well as animal life is largely dependent uponwater for its very existence. From prehistoric times man hasused water from

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