Several simple experiments using easily obtained materials are described which illustrate some of the properties of light (travels in straight lines, reflection, and refraction). (JR)

Provides many useful suggestions and cautions for planning and executing a biology field excursion. Specific procedures are outlined for investigating land communities and coastal areas, and a number of follow-up laboratory activities are described. The appendix provides an extensive bibliography with useful comments on the literature. (JR)

Advocates an international, humane role for science in a call to scientists and engineers to expand their social concerns from the domestic to the international scene. Major concerns to scientists should include: population and food supply, urbanization and industrialization, energy supply, human relationships, environment and natural forces,…

Presents a list of selected articles on astronomy instruction at high school, college, and graduate levels, especially those for college nonscience majors. Besides teaching materials and aids, related societies, organizations, planetariums, and periodicals are incorporated as entries of primary sources. (CC)

This service, offered by The Family Coordinator, is a report of articles found in journals which are not likely to be read regularly but offer an article or special issue of particular usefulness in the family field. Topics included in this issue are paternal rights, student marriages, women's studies, sex, Kibbutz Children, intermarriage and…

Discusses the sources and effects of nutrients in wastewater, and the methods of their removal in wastewater treatment. In order to conserve water resources and eliminate the cost of nutrient removal, treated effluent should be used wherever possible for irrigation, since it contains all the ingredients for proper plant growth. (JR)

Analyzes job situations for chemical professionals on the basis of the survey findings obtained by the Chemical and Engineering News and the College Placement Council. Indicates a slight recovery in employment in 1973. (CC)

A unit to be used as a means of assisting students in formalizing their position on the fundamental issues within the energy crisis includes objectives, learning activities, and a resource list. (Author/KM)

A time capsule, a sketch of events during the pre-Revolutionary War period of 1771-1776, a list of leading characters and a bibliography are offered as the basis for a re-enactment, role playing, simulation, and in-depth studies. (KM)

Discusses formation of chemical molecules via Mobius strip intermediates, and concludes that many special physics-chemical properties of the fully closed circular form (1) of polyoma DNA are explainable by this topological feature. (CC)

Summarizes the type of work carried out by forensic chemists and the minimum qualification needed for appointment. Indicates that there are eight Home Office regional forensic science laboratories in addition to the Central Research Establishment at Aldermaston. (CC)

Discusses present and future problems of producing clean energy. Graphically presents the changing patterns of fuel use in the United States over the past century, and predicts population growth and energy sources and consumption up to the year 2100 for the United States and the world. (JR)

Reviews the Sixth Berkeley Symposium on Mathematical Statistics and Probability, in which participants sought to establish a realistic cross-section of contemporary statistical thinking about the effects of pollution on health. Present information of health effects of pollutants is fragmental, and further studies are urgently required for…

Outlines the history of contraception, tracing the development of contraceptive methods from those used in primitive societies to the most recent techniques made available by medical science. Also describes the activities of the pioneers who have popularized birth control. (JR)