Characterizes a number of the bench-type chemical laboratory hoods. Reports results of a study that determined the levels of protection each type provides, exploring variables such as laboratory air supply systems, face velocity, work practices, personnel movement, and the effect of equipment location in the hood. (CS)

Describes a method to demonstrate induction heating by placing an ordinary mercury thermometer in a high frequency magnetic field and observing the temperature rise. Also describes an ice calorimeter for measuring the mechanical equivalent of heat. (SK)

Provides directions for constructing a wooden or metal weather vane. Also describes the construction of a "Boomerang Drum," a machine which can store and release energy, and suggests activities for use with it. (DS)

Describes experiments using solid state detectors in modern physics courses. The apparatus involved is simple and inexpensive, avoiding costly electronics, and the very high efficiency of plastic detectors in particular makes them ideally suited for work with very weak radioactive sources. (Author/SK)

Discusses various topics in microelectronics to aid those teaching modern electronics for the first time, including, among others, the slang name "micro," attitudes of examining boards, rapid obsolescence of electronic devices, costs, analog systems, and digital systems. (SK)

Described is an experiment designed to provide an experimental basis for a unifying point of view (utilizing theoretical framework and chemistry laboratory experiments) for physical chemistry students. Three experiments are described: phase equilibrium, chemical equilibrium, and a test of the third law of thermodynamics. (Author/DS)

Describes research on in situ processing to develop necessary theory and understanding of the underground process to facilitate commercialization of a wide range of mineral deposits. Goal is to produce laboratory and computer-based tools to allow site evaluation based on field and laboratory measurements of mineral and associated overburdens.…

Presents one of the modules of the Science Teaching Project of Australia. The module, Science Room Management, is designed to help teachers organize their science rooms so that they can use them more efficiently. (HM)

Describes a project designed to increase science literacy in the general public by bringing hands-on experiments with real-world applications to public school students. Provides the history and an outline of the program. (DDR)

Described are the theory and operation of Van De Graaff generators. The experience of one group of people in the reconditioning and repair of their apparatus is discussed. (CW)

The advantages of microchemistry in terms of economics and safety are discussed. A list of six companies known to supply apparatus and reagents for microscale experimentation is provided. (CW)

To avoid a tedious task for recording temperature, a computer was used for calculating the heat of crystallization for the compound sodium thiosulfate. Described are the computer-interfacing procedures. Provides pictures of laboratory equipment and typical graphs from experiments. (YP)

Describes the current use of automation in the laboratory. Discusses the need, flexibility, and benefits of automation. Presents a generic system description. Lists commercially available laboratory robots. (MVL)

Discusses the making of a light engine powered by sunlight or a lamp. Describes the materials and construction method with detailed specifications and diagrams. (YP)

Presents a programed method that inventories and classifies hazards. 8iscusses the following topics: (1) student and hazard source, (2) elimination of the source, (3) adaptation of the source, (4) isolation of the source, (5) adjustment of the surroundings, (6) isolation of man, and (7) personal protective equipment. (MVL)