Discusses the making of a light engine powered by sunlight or a lamp. Describes the materials and construction method with detailed specifications and diagrams. (YP)

This booklet presents the language used in dealing with water. The booklet is intended to provide decision-makers with an adequate base of information to analyze water sources for consumption, recreation, and industry. The first section defines water and its properties, geologic locations, domestic and industrial uses, and patterns of change. The…