At all levels of instruction commonplace items such as fruit, gelatin, golf and tennis balls, and sugar cubes can be used to demonstrate geographic concepts such as earth-sun relations, locative grid, structure of the earth, glaciation. Tactile and visual demonstrations in which students participate are more effective than other alternatives. (NH)

Discusses the problems of the Mechanical Engineering Technology (MET) program and the use of a more flexible program of equipment and facility use. (GR)

Discusses danger of explosions with molten salts baths, commonly used as heat-transfer media. One such explosion involved use of a bath containing 3-lb sodium nitrite and 1-lb potassium thiocyanate. Although most commercially available mixtures for heat transfer contain oxidizers, a reducer (thiocyanate) was included which possibly triggered the…

Points out that excellent results are obtained using an air-natural gas flame in atomic absorption experiments rather than using an air-acetylene flame. Good results are obtained for alkali metals, copper, cadmium, and zinc but not for the alkaline earths since they form refractory oxides. (Author/JN)

The use of computers as laboratory instruments is viewed as overlooked. Numerous applications developed for a simple, single-board microcomputer by a group of Technical Education Resource Centers (TERC) are noted. The trend toward decreasing costs of lab interfacing is expected to continue into the future. (MP)

A survey of freshman chemistry laboratory manuals identified 15 questionable laboratory procedures, including the use of potentially hazardous chemicals. Alternatives are suggested for each hazard discussed (such as using a substitute solvent for benzene). (SK)

Describes recent developments in instrumentation for clinical chemistry in the areas of general chemistry, immunoassays, urinalysis, electrophoresis, chromatography, and trace metal analyses. (CS)

Discusses problems of handling, storage, and disposal of chemicals in Australian secondary school science laboratories, and suggests ways of reducing the potential hazards which exist. (HM)

Presents the philosophy and mechanics of a professionally oriented astronomy laboratory for nonscience majors. Design of the laboratory, description of the exercises, and the results of using this approach at the University of Kansas are also described. (HM)

Discusses the possible dangers of the educational radioactive sources used in a college physics laboratory. The discussion is intended to increase the awareness of teachers and students. (HM)

Presented is a statement of the need for school science technicians to service laboratories. A formula for determining the minimum level of provision of science technicians in schools is provided. (SA)