Describes the operation and educational benefits of the use of a closed circuit television system in the demonstration of a hologram. (CP)

Describes how to assemble a respirometer from common laboratory materials for quantitative measurements of gas production. (LS)

Describes a variety of classroom aids and indicates the sources. Included are storage facilities, sound experiments, stop watch, ultraviolet lamp, calculators, animal cages, and others. (RH)

Includes description of a light meter, photometer, fluid flow apparatus, and acoustic grating. (RH)

This product reference guide provides assistance in locating specific types of equipment used in the analysis and control of air, water, and noise pollutants. (CS)

This section of the product reference guide provides information for locating specific types of equipment used in solid and liquid waste handling and disposal. (CS)

This article provides a diversity of manufacturers literature dealing with advances in technology and equipment associated with analyzing and controlling air, noise, and water pollutants. (CS)

Describes some of the advantages of having the science teacher develop, use, maintain, and troubleshoot the new instructional materials. (GA)

Describes some laboratory apparatus and demonstrations; describes an electronic device to illustrate an octave synthesizer; shows how to get negative changes from an electrophorous; explains a body levers device to clarify the principles of moments and levers; and finally shows how to demonstrate acceleration in simple harmonic motion. (GA)

Describes a few apparatuses and demonstrations for teaching physics under the headings: demonstrating resonance of the inner ear, constructing a potential well-hill for overhead projectors, rubber tube vacuum pump, improvement on the simple homemade motor, air track to demonstrate sailing into the wind, and center of gravity and stability. (GA)

Describes a device for maintaining the proper water level in knife boats during ultramicrotomy. Water levels in troughs are adjusted rapidly and precisely during the cutting process. Illustrations are included. (Author/MA)

Reviews theories, developments, and advances in the field of acoustic microscopy. (SL)

Describes a simple water channel, for use with an overhead projector. It is run from a water tap and may be used for flow visualization experiments, including the effect of streamlining and elementary building aerodynamics. (MLH)

Reviews developments in electron spectroscopy, x-ray spectroscopy, and nuclear magnetic resonance instrumentation. (SL)

Reviews instruments available for photographing and recording heat flow and temperatures in objects. (SL)