Describes a chemical engineering laboratory course based on the modelling and computer simulation of dynamic experimental conditions. (MLH)

Describes how the principles of reactor analysis can be used to study human circulation. (MLH)

Several teaching aids including a microcomputer system, a process control laboratory, a mechanics laboratory, and a teaching polariscope are described. (RH)

Describes an undergraduate experiment that provides instruction in nuclear magnetic resonance (NMR) spectroscopy, reaction rates, and the application of mathematical procedures. (MLH)

Describes a natural-products experiment involving steam distillation, solvent extraction, and spectroscopic identification. (MLH)

The use of the single pan balance to determine the mass of objects is described. (SD)

Describes a laboratory experiment in which the experimental data agree well with the empirical law. Demonstrates that transparent materials reflect light. (CP)

Presents experiments, demonstrations, activities and ideas relating to various fields of biology to be used in biology courses in secondary schools. Among those experiments presented are demonstrating the early stages of ferns and mosses and simple culture methods for fern prothalli. (HM)

Presents experiments, demonstration, activities and ideas relating to various fields of physics to be used in physics courses in secondary schools. The use of a programable pocket calculator in A-level physics courses is among the activities described. (HM)

Explains a new method of detecting radioactive isotopes by counting their accelerated ions rather than the atoms that decay during the counting period. This method increases the sensitivity by several orders of magnitude, and allows one to find the ages of much older and smaller samples. (GA)

Describes experiments in ice physics that demonstrate the behavior and properties of ice. Show that ice behaves as an ionic conductor in which charge is transferred by the movement of protons, its electrical conductivity is highly temperature-dependent, and its dielectric properties show dramatic variation in the kilohertz range. (Author/GA)

Assesses the broader aspects of the roles of the physics teacher and the physicist in the Third World, and discusses some of the problems they face in general administration, teaching, and research. (GA)