Indicates that academe must emphasize professional responsibility for chemical health and safety and engender a similar concern in students. Suggests this may be accomplished both by informing students and by helping them make reasoned decisions concerning their exposure to these hazards. (Author/JN)

Discusses the chemical nature of gallstones and theories related to their formation. Also discusses experimental procedures used to identify chemical constituents of gallstones, indicating that cholesterol is found in almost 75 percent of stones examined. (JN)

Describes an experiment in which students: (1) synthesize tris(acetylacetonato)iron(III), tris(diethyldithiocarbamato)iron(III), and chlorobis(diethyldithiocarbmamato)iron(III); (2) are given a sample of potassium hexocyanoferrate(III); and (3) are then asked to measure the room temperature of these samples using the Guoy technique. Background…

Describes the procedures and rationale involved in selecting the National Study of School Evaluation Elementary School Evaluative Criteria as the self-study instrument by a laboratory school in Iowa. Explores major features of these criteria and discusses their advantages and disadvantages as guidelines for elementary school self-study. (DMM)

Using different supporting electrolytes, the influence of complex-forming equilibria on migration velocities of strontium-90 and yttrium-90 can be demonstrated in this experiment. Includes procedures and materials needed. (SK)

Describes a set of undergraduate laboratory experiments which provide experience in deuteration and derivatization procedures applied to infrared spectroscopy. Basic skills in vacuum-line technique are also taught while measuring infrared spectra of deuterated solid samples and demonstrating the value of derivatization as an aid to interpreting…

Highlights procedures and results of an experiment using atomic absorption spectroscope to illustrate a fundamental chemical concept. The experiment demonstrates the dependence of the solubility product of lead sulfate on ionic strength in the presence of a slight excess of anion. (Author/JN)

Perspectives on the issues of the effectiveness and the role of laboratory work are provided through a review of the history, goals, and research findings regarding the laboratory as a medium of instruction in introductory science teaching. Suggestions for researchers working to clarify the role of the laboratory are made. (Author/PN)

Development of a student evaluation system for two preclinical dental laboratory courses is described. The system uses an analytic technique for identifying components of the evaluation system that contribute to and detract from the evaluation's reliability. Further refinements based on this technique are discussed. (Author/MSE)

Highlights activities and scientific accomplishments at the Medical Research Council Laboratory of Molecular Biology in Cambridge, England. Includes comments by staff scientists about their current research endeavors. (JN)

Pritchard discusses the opportunities for applied learning afforded by laboratories. Braker describes the evaluation of cognitive, affective, and psychomotor skills in the agricultural mechanics laboratory. (SK)

Examined generalizability of social-skills and social-anxiety global ratings made by judges trained in six different experimental laboratories. Found moderate degrees of generalizability across laboratories for the social-skills and social-anxiety ratings based on brief role plays. For more extended interaction, obtained moderate generalizability…