Festivities to celebrate the 500th anniversary of the birth of Copernicus included many discussions on disturbing and tantalizing questions about science.'' (PS)

Learning for the student in today's world is dependent on enrichment other than that provided in the classroom. The world within and outside classroom walls must be united, including the utilization of daily increasing resources available outside the school. (Author)

Reviews past and present arguments for and against the Delaney Clause'' of the Federal Food, Drug, and Cosmetic Act. The clause prohibits use, in food, of any amount of any substance that has caused cancer in man or animals. (AL)

An industry, previously dealing only with products, is successful in marketing services such as its programed self-instruction kits and safety management consulting services. (CP)

Summarizes the nature of detergents and the effects they cause in water and sewage treatment plants. Particular reference is given to the Australian situation. (AL)

A listing of producers of audiovisual aids including the types of materials produced and the kinds of services provided by each company. (AK)

The director of the Audiovisual Center at Southern College of Optometry describes and audio system for the library that began with two goals: to record every lecture in every class for the entire year on individual cassettes and store them in the library for student use, and secondly, to do so within a very limited budget." (Author/AA)