A microcosm is a small, completely sealed, self-sustaining ecosystem. Once a microcosm has been sealed in a transparent container, only light and some heat can enter and only excess heat can leave. This manual describes how to set up aquatic microcosms using glass jars and little or no collecting equipment. The activities can be tailored to suit…

In these years of shortened budgets, teachers are becoming more and more inventive in designing science teaching tools and experiments. This manual contains instructions for building a few such tools, either invented or improved on by teachers affiliated with the Institute for Chemical Education (ICE). The tools are created from low cost and…

Described are multichannel analyzers and a high-speed digital counter for a lecture room. (CP)

A variety of equipment and materials for teaching science are described. Included are films, film loops, balances, and other items. (RH)

Offers a description of the instrumentation and methods utilized in this attempt at naked eye astronomy one century after the invention of the telescope. Also examines the motives which resulted in the implementation of an antiquated mode of observation. (Author/CP)

Describes the design and use of a water-lens microprojector constructed from inexpensive materials. Provides detailed drawings of the microprojector and outlines one method for determining the magnification of lenses used. (GS)

A manufacturer of physics apparatus answers questions about new equipment production, features included, reliability, cost, and teacher modifications. (GS)

Discussed is a science project in which secondary school physics students constructed a radio telescope to use in the study of radio astronomy. (PEB)

An electronic device is described which can be used for demonstrations and laboratory work in Fourier synthesis, phase and group speeds, beats and modulation, and Lissajous figures. The hardware required is inexpensive and simple. (Author/RH)

Discussed are past work and recent advances in the use of electron microscopes for viewing structures immersed in gas and liquid. Improved environmental chambers make it possible to examine wet specimens easily. (Author/RH)