Show HISTORY OF RAIN RA DROPS AS TRACED PROM from TUB STORM TO THEIR fayak LV THE OCEAN uncle sams extensive work in in the water supply great subterranean rivera pulu tion of domestic water tho the history of tho the rain drops and the snow hakes flakes from froin tile the time of their formation till it merges with tho the ocean to bo be again evaporated and and repeat pe at tho the process Is a long and devious one somo some of tho the rain min of course falls hade back into tho the ocean but much finds a temporary abiding place on the tha tops topa of 0 high inland mountains and enjoys a year or more ciora os of travel aud and usefulness before it finally reaches its old mother ocean the government Is devoting considerable sid sider erable ablo energy to tho the accumulation find and dissemination ot of facts concerning tho the behavior of water from the time it reaches tile tho eartly earth as rain or snow enow until it joins the ocean or great navigable rivers public appreciation of tho the value of this work has jiten steadily d 11 y increased and urgent demands for its extension havo have come from all sections of tho the country tho the work vork includes the tha collection of data relating to tho the flow of surface streams et reams researches on the tha location aud and movements of under ground waters great subterranean rivers which move with deliberation and tho the investigation of the physical character of these thesa waters buch as hardness color turbidity etc the sources and effects or of the pollution of municipal water supplies havo have also received much study measuring tho the streams Str coina flow As a demig of obtaining reliable records of stream discharge in tho the important river basins of tho the country SUU gati ging or measuring stations are maintained by the Govern government mont tho the records furnished by these stations are used by manufacturers rs and invest In vestora org in planning the development ot of water power by municipalities cipal atles in of water supply and by irrigators Irrl gators in de ing tho the acreage aleaga which can la ba reclaimed from desert conditions condi tiona and the crops which can safely bo be planted they aro are also ot oc greta import ance to engineers who abo obtain from them data tor for tho tha study of many problems such as the relation between rainfall and runoff run off tho the effects ot of forests upon stream flow the durence occur ou ence rence and control of floods etc throughout the eastern part of the united states the tha surface waters have great value as a source ot or cheap power and tho the demand for steam gauging data Is constantly growing as manufacturing fac turing enterpriser are developed in densely populated sections problems of water supply and sewerage sewer ngo disposal have also boeme urgent and are often complicated by the fact that cities not only draw their of water from convenient streams but in many cases empty their sewerage into them thein as well in such baich thickly settled regions even small and insignificant streams must be utilized to their fullest capacity in the central states underground as well troll as surface waters are arc usei used for both industrial ami municipal purlous pur |