Underground Movement of Bacterial and Chemical Pollutants

more than any other single factor, limits the growth and controls the prosperity of the Southwest. The awareness of the people of this region of the dependence of their agriculture and industries on water is without parallel elsewhere in the United States. To water works engineers and officials, and to enlightened citizens alike, the idea of rejecting used water simply because it has acquired the unsavory name of "sewage" is becoming patently absurd. In what other field of human activity, they ask, is so valuable a vehicle employed to transport so small a burden; and in what other circumstance is the trans-