Your Water Works Committee has the honor to report:

1. We call attention to the very comprehensive treatise on water works affairs, "The Manual of Water Works Practice," just published by the American Water Works Association.

The contents of the volume are as follows:

INTRODUCTION

Chapter I-Development of modern water works-Elements of service rendered-Significance of water supply in disease incidence-Jurisdiction of state and federal authorities-International aspects of water pollution-Liability for water borne typhoid fever-Beautification of water works properties.

COLLECTION OF WATER

Chapter II.-Allocation of streams-Compensation in money and in kind for water diversion-Watershed yields and required storage-Flood flows and the design of spillways and other structures.

Chapter III.-Watershed protection-Industrial wastes.
Chapter IV.-Ground water.

QUALITY OF WATER SUPPLY

Chapter V-Objectionable limits of constituents of water and their relation to practical problems-Standards of water quality.

TREATMENT OF WATER

Chapter VI.-Self-purification of streams, lakes and reser

voirs-Advantages of outlets at different levels for deep reservoirs-Algaecides.

Chapter VII.-Chlorination, super-chlorination and dechlorination.

Chapter VIII.-Aeration-Natural subsidence, coagulation and rapid sand filtration-Slow sand filtration-Double filtration-Covers for filtered water reservoirs.

Chapter IX.-Removal of iron and manganese.

Chapter X.-Water softening by lime and soda-Zeolite

treatment.

Chapter XI.-Ultra-violet ray treatment-Ozonization.

Chapter XII.-Treatment of water with iodide for the prevention of goitre.

DISTRIBUTION OF WATER

Chapter XIII.-Large mains-Distribution systems-Pressure tunnels-High pressure fire systems.

Chapter XIV.-Sizes of filtered water reservoirs.

Chapter XV.-Pumping station practice.

Chapter XVI.-Service-Loss of head in corporation cocks

and service pipes-Thawing frozen services.

Chapter XVII.-Plumbing in relation to water supply.

Chapter XVIII.—Corrosion-Electrolysis.

Chapter XIX.-Water consumption and meterage-Industrial requirements-Water waste control.

FINANCING AND MANAGEMENT

Chapter XX.-Adopted slides for meter rates-Data water charges.

Chapter XXI.-Price trends.

Chapter XXII.-Valuation of water works-Reasonable provisions for depreciation.

Chapter XXIII.-Financial requirements for betterments— Taxation-Legal limitations on bonded indebtedness-Water districts.

Chapter XXIV.-Operating practice.

FIRE PROTECTION

Chapter XXV.-Annual fire losses, United States and elsewhere.

Chapter XXVI.-Charges for public and private fire protection services.

APPENDIX

Standard Forms, Procedures, Specifications and Contracts. Standard form for annual reports.

Mechanical analyses of filter sands and gravels.

Standard specifications for cast-iron pipe and special castings.

Standard specifications for valves.

Standard specifications for hydrants.
Standard specifications for meters.

Specifications for water works chemicals.
Specifications for pressure water filters.

Specifications for sanitary drinking fountains.

Standard form of construction contract.

Standard Schedule for Grading Cities and Towns; National Board of Fire Underwriters.

The several members of your Committee have in some small measure collaborated in this work, and heartily commend Mr. George W. Fuller, chairman, and members of his "Manual" Committee for their arduous, intensive labor and study, resulting in this monumental accomplishment.

2. Mr. James H. Fuertes has contributed the following paper, which he entitles:

"Novel Features Incorporated in New Denver Filter Plant" "The new sixty-four million gallon Marston Lake Water Purification Plant put into operation in August, 1925, at Denver, Colorado, has many novel and interesting features. The process is that of rapid filtration preceded by screening, aeration, coagulation and accompanied by sterilization. The work consists of an intake, screening plant, aerators, mixing chambers, coagulation basin, rapid filters, clear water reservoir and a boiler, pump and head house containing the mechanical equipment, heating boilers, coagulant storage, storage facilities for wash water, high pressure water and air. The water treated is drawn from Marston Lake, which in itself is fed largely from the South Platte River. The water contains bacterial contamination, turbidity, tastes, odors, and in summer a heavy growth of microorganisms.