Describes a simple method of measuring the refractive index of a liquid using a paper cup, a liquid, a pencil, and a ruler. Uses the ratio between the actual depth and the apparent depth of the cup to calculate the refractive index. (GA)

Reports and summarizes some of the findings of a conference, held in Oxford in July 1978, to discuss the role of the laboratory in physics education. (GA)

This laboratory experiment was designed for undergraduate students. It demonstrates the use of simplex optimization in a simple and straightforward manner. (BB)

The gravimetric determination of calcium as calcium carbonate is described. This experiment is suitable for undergraduate quantitative analysis laboratories. It is less expensive than determination of chloride as silver chloride. (BB)

This demonstration uses the electrophoresis of indicators to demonstrate the principles involved in the separation of isoenzymes. (BB)

Provides a look at the methods of paleoanthropology. The shape of a bone, the location of a muscle, or the wear on a tooth can help define environmental context and the course of species evolution. (BB)

Describes the following laboratory equipment: Biophysics modules to perform bioelectronic investigations of the human body; a large sine wave analog for large audience demonstrations; a resonance tube for measurement of speed of sound; and the snooperscope, a gadget to demonstrate infrared waves. (GA)

Fluorine, selenium, tin, and arsenic are among the trace elements occurring in the environment which are considered. Emphasis is given to developing a qualitative survey of the extent and kinds of metal transformations and their resultant effects. (CS)

Outlines a structure of practical work designed to overcome two weaknesses which militate against effective learning; the insufficient emphasis on the mastery of skills, and the lack of responsibility exhibited by students with respect to their own learning. (GA)

Describes an experiment to characterize the enzyme polyphenol oxidase. Includes Purpose, Reagents and Equipment, Procedure, Extraction, Treatment of Data, and Discussion. (MA)

Describes the use of student-made photomicrographs as a source of student motivation and as a means for review of laboratory exercises in an introductory microbiology course. Includes an evaluation of this teaching method. (Author/MA)

Describes an experiment that utilizes fluorescence intensity measurements from a Spectronic 20 to determine the rate constant for the fluorescence quenching of various aromatic hydrocarbons by carbon tetrachloride in an ethanol solvent. (MLH)

Describes a versatile apparatus for demonstrating the imaging properties of various types of electrostatic lenses. The apparatus can be used to study the focusing properties of different types of electrostatic electron or ion lenses or their combinations. (MLH)

Many teachers have discovered the value of using newspapers in their classrooms. Suggests a number of specific, fun activities using this motivating and inexpensive resource. (Editor/RK)

A discussion of the teacher responsibility to student with regard to safety in the shop. (HD)