A photoelectric on-point detector for Winkler oxygen titrations is described. (MR)

Describes and illustrates the pond model of wastewater treatment adapted by a small Maine town. Includes wastewater collection, treatment, sludge disposal, and chlorination. (MA)

This article is part two in a series. It builds upon the first article and demonstrates, in a step-by-step fashion, the simplicity of using Caldwell-Lawrence diagrams to determine the amount of conditioning chemicals required to produce protective waters. (Author/MA)

An attempt to determine the reasons for substandard wastewater treatment plant performance is made. Recommendations include a change in existing operator training methods. (MR)

Ten case reports of agricultural uses of thermally conditioned wastewater treatment sludge are given to show a way of recycling wastes. (MR)

Numbers of port calls and oil spillage data by U.S. and foreign flag tankers for the years 1973-75 are provided. Major tanker-related oil spills in U.S. coastal waters are discussed. (CP)

The purpose of this study was to research the purported effects of reduction of "mind set" and achievement of greater consistency in data classification when using Simon's Problem-Solving Approach. (Author/JC)

This 11-minute videotape and poster can be used for interactive instruction in grades 6-12 science classes. Issues examined in this videotape include preserving precious water resources, protecting the environment from pollutants caused by urban and agricultural development and industry within changing lifestyles, and ensuring the availability of…

Considering that, of the 250 million new cases of water-associated diseases reported every year, 75% occur in tropical, poor, rural areas and slum-outskirts of big cities, it becomes clear that water education is a priority. This booklet illustrates that early water education can benefit the entire community. Since habits related to water use are…

Michiganders by the thousands proved ready to spend part of their on developing a statewide environmental education program. (Editor)

Headquartered at Joliet, Illinois, the Army Ammunition Procurement and Supply Agency aims to mechanize and clean up its manufacturing facilities. Six go-co (government owned - contractor operated) plants involved in the modernization program are described. (BL)

Describes activities abroad Liberty Chesapeake,'' a 133-foot-long retired lightship moored off the East Potomac Park, Washington, D.C., and used as a public excursion boat and floating laboratory by the U.S. National Park Service. (DS)

Data from the Third Annual Report of the United States Council of Environmental Quality are used in an editorial advocating the use of some of the money committed to cleaning air and water to create a more adequate knowledge base for action. (AL)