Compares and contrasts effects of two spectroscopic techniques on bromine and iodine vapor. (CS)

Presents nine physics notes for British secondary school teachers. Some of these notes are: (1) speed of sound in a steel rod; (2) physics extracts-part four (1978); and (3) a graphical approach to acceleration. (HM)

Describes some undergraduate laboratory experiments in acoustics which involve the analysis of speech and musical instrument sounds and the general analysis of the frequency range of complex sounds. (HM)

Presents experiments that illustrate some physiologically important aspects of ligand binding to hemoglobin. (CS)

Describes a technique for the supercooling of water, for use in the science classroom, involving adding common salt to a mixture of ice and water. Several investigations are included for use during (and after) the process of supercooling. (DS)

Described is a laboratory procedure which uses the small intestines of mice as models for the transport of glucose and other solutes. Demonstrations are suitable for either introductory or advanced physiology courses. (RE)

Described are various methods for producing black and white photographs of microscope slides using single lens reflex, fixed lens, and plate cameras. Procedures for illumination, film processing, mounting, and projection are also discussed. A table of comparative film speeds is included. (CS)

A laboratory exercise for dental students is presented using a toxic dose of lidocaine in place of an anesthetic dose of pentobarbital. The use of lidocaine demonstrates its toxic and lethal actions and increases the relevance of the experience for dental students. (Author/MLW)

This article discusses training programs for environmental technicians at wastewater treatment facilities. Special attention is given to start-up orientation and training. (CS)

Suggested specifications for microscopes for various applications are given. A discussion of the ways of meeting these specifications in practice is illustrated by current models from British and foreign manufacturers. (BB)

Discusses a teaching program for introductory chemistry laboratories that allows for differences in student background and ability. The flexible program involves self-pacing and a classification of experiments; this permits slower students to proceed through remedial loops while advanced students proceed to more difficult experiments. (MLH)

Discusses the concept of educational efficiency of instructional methods, and suggests that although lab reports are effective learning tools, they are inefficient as an evaluation method. (MLH)

Describes two investigative labs that use live plants to illustrate important biological principles, include quantitative analysis, and require very little equipment. Each lab is adaptable to a variety of class sizes, course contents, and student backgrounds. Topics include the evolution of flower size in Mimulus and pollination of Brassicas. (DDR)

Presents two simple and reliable ways for measuring protease activity that can be used for a variety of investigations in a range of biology class levels. The investigations use protease from a variety of sources. (DDR)

Discusses processes for change that have been used to introduce innovative learning processes into laboratory courses. In one case the content of the course was not changed, just the order of presentation. In the second example cooperative learning processes were introduced in order to facilitate a change in the course content. (AIM)