INTRODUCTORY. 475 THE CONCESSION. 476 GEOLOGY AND TOPOGRAPHY. 476 POPULATION, AREA, AND MORTALITY. 479 RAINFALL AND TEMPERATURE. 480 AVAILABLE SOURCES OF SUPPLY. 484 MATERIALS FOR CONCRETE. 491 ESTANZUELA SUPPLY. 494 SOUTH DISTRIBUTING RESERVOIR. 506 SAN GERONIMO GRAVITY SUPPLY. 514 DISTRIBUTING RESERVOIR AT OBISPADO. 525 COMPARISON OF SOUTH AND OBISPADO RESERVOIRS. 530 ANALYSES OF ESTANZUELA AND SAN GERONIMO WATERS. 532 CITY WATER DISTRIBUTION SYSTEM. 532 MAIN SEWERAGE SYSTEM. 539 MAIN OUTFALL SEWER. 542 SEWAGE DISPOSAL WORKS AND IRRIGATION LANDS. 545 QUALITY OF AND RATES FOR LABOR. 552 COST OF WORKS. 552 TARIFFS AND SANITARY REGULATIONS. 553 ENGINEERS, ETC. 556 DISCUSSION. 557 JAMES D. SCH…
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