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. SCHUYLER. 557
DAVID T. PITKETHLY. 559
V. SAUCEDO. 563
GEORGE T. HAMMOND. 567
RUDOLF MEYER. 576
GEORGE ROBERT GRAHAM CONWAY. 580