This review, designed to make analysts aware of uncertainties introduced into analytical measurements during sampling, is organized under these headings: general considerations; theory; standards; and applications related to mineralogy, soils, sediments, metallurgy, atmosphere, water, biology, agriculture and food, medical and clinical areas, oil…

This review on infrared spectrometry covering the period from late 1981 to late 1983, is divided into nine sections. Topic areas include: books; reviews; analytical applications; biochemical applications; environmental applications; polymer applications; infrared instrumentation; sampling techniques; and software and algorithms. (JN)

Describes an undergraduate experiment for the potentiometric determination of urea based on the physical entrapment of urease on the tip of an ammonia gas sensor. An advantage of this technique is the ease with which the ammonia electrode can be converted to a urea electrode. (JN)

Reviews the English booklet, "Safety in Science Laboratories." Included in the booklet is a discussion of teacher roles in ensuring safety in chemistry and biology laboratories. (SL)

Discusses several alternatives to the use of laboratory animals in investigating biomedical problems. Alternatives include tissue culture, use of plant and bacterial material, redesigning experiments, and construction of mathematical and computer models. (CS)

Describes the use of the magnetometer in an introductory undergraduate geology course. (SL)

Discusses the theory and experimental procedures for using Young's eriometer to determine the diameters of blood corpuscles, lycopodium powder, and wool fibers. (CC)

A rationale for using mathematical games as an instructional procedure to introduce and practice skills is discussed; two mathematical games for classroom use are briefly described. (DT)

Describes the experimental procedures for isolating fungi and demonstrating their tolerance of fungicides such as creosote and organic mercury. (JR)

Discusses the use of two television sets with UHF coverage and a window screen or aluminum foil reflector to conduct a take-home experiment in physics. (CC)

Students in a methods course on teaching elementary mathematics participated in a mathematics laboratory in a public school. Evaluation indicated that reactions and attitudes were favorable toward the experience. (JP)

Describes several sources of error in a sampling and analysis procedure for oxides of nitrogen from stationary sources (Method 7, Federal Register, 1971), and provides methods for resolving these errors. (JR)