1. Geology and water-bearing deposits.-Indian Wells Valley is virtually a closed basin bordered by consolidated generally non-water-bearing rocks. This basin is filled by unconsolidated deposits of clay, sand, and gravel derived from the mountains and bordering highlands. The principal waterbearing deposits are the younger and older alluviums; a main water body occurs in these deposits, principally beneath the surface extent of the younger alluvium. This estimate of transmissibility, utilized in conjunction with the crosssectional area and the hydraulic gradient of 1921, suggests an underflow at midvalley under natural conditions of about 15,000 acre-feet a year. The underflow is a measure of the recharge and discharge. The quantity of groundwater discharge estimated as the sum of evapotranspiration and groundwater outflow, or about 11,000 acre-feet per year under natural conditions, is about 4,000 acre-feet less than the estimate based on transmissibility, crosssectional area, and hydraulic gradient. 5. Perennial yield.-Perennial yield of a groundwater basin is the rate at which ground water can be withdrawn year after year without depleting groundwater storage to such an extent that withdrawal at this rate is no longer feasible because of increased pumping costs or deterioration of quality. The estimated perennial yield of Indian Wells Valley, based on estimates of evapotranspiration and underflow at midvalley together with other groundwater data, is approximately 12,000 acre-feet per year-about 4,000 acre-feet more than the estimated pumpage in 1953, but about 4,000 acre-feet less than the estimated total discharge.

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turned out, his last move was to Harvard. The years '94-'95 and '95-'96 were spent in the Graduate School. He took the master's degree at the end of the first year, and at the end of the second he was awarded a Parker Fellowship for study abroad. His two years at Leipzig were most profitably spent. He chose as his master that most original geometer, Sophus Lie, then at the height of his fame. As a matter of fact, Bouton was one of the great Norwegian's last pupils, for Lie returned to Norway in 1898 and died soon after. All of Bouton's subsequent scientific work bore the clear impress of Lie's genius. His two advanced courses, which he originated soon after his return to Harvard, dealt respectively with the theory of geometrical transformations and the application of transformation groups to the solution of differential equations. The graduate students who subsequently had the good fortune to prepare for the doctorate under his care generally took up subjects connected with the theory of transformations.After receiving the doctorate at Leipzig in 1898 Bouton returned to Harvard and began a long period of work, broken only by occasional sabbatical absence. He threw himself with the greatest zeal into his duties as a teacher. At one time or another, beside the alternating advanced courses mentioned, he taught nearly every one of the lower and *