Describes a procedure for oxygen generation by thermal decomposition of potassium chlorate in presence of manganese dioxide, reacted with various sulfides. Provides a table of sample product yields for various sulfides. (JM)

The easily obtained common snail shows interesting dietary preferences which can be the source of several simple experiments. Specific student instructions are given for quantitative and comparative studies using cabbage, lettuce, carrot, rutabaga, and onion. Suggestions for laboratory setup and further work are included. (DH)

Examines factors affecting attitudes toward laboratory chemistry. Subjects (N=1638) were grade 11 chemistry students in 78 schools in rural, suburban, and urban Oyo State, Nigeria. Data indicate that students' attitudes toward chemistry as a subject is the most important determinant of the attitude toward the laboratory. (JM)

Examines some of the considerations involved in setting up a typical oxygen/organic reaction. These considerations (including protection for personnel/equipment, adequate ventilation, reactor design, maximum reactor charge, operating procedures, and others) influence how the reaction is to be conducted and what compromises the scientist must…

Part I of this paper (SE 538 295) described a simple model for estimating laboratory concentrations of gas phase pollutants. In this part, the measurement of ventilation rates and applications of the model are discussed. The model can provide a useful starting point in planning for safer instructional laboratories. (JN)

Discusses a simple method for following the movement of a solute in an adsorption or ion exchange system. This movement is used to study a variety of operational methods, including continuous flow and pulsed flow counter-current operations and simulated counter-current systems. Effect of changing thermodynamic variables is also considered. (JM)

Chickens, instead of rats, were used in an upper-level laboratory course on animal learning. To help other instructors interested in using chickens for a lab course, a discussion of the physical and behavioral characteristics of chickens is provided. Student reaction to the course is also discussed. (RM)

Content, readability, safety aspects, appearance, technique, effectiveness of experiments, enrichment exercises, teacher aids, and special features of 12 physics laboratory manuals are reported and compared. (JN)

Discusses issues and the public's concerns related to using laboratory animals for research purposes. Indicates that several perceptions (such as recognizing that the public's attitudes toward respect for animal life are no more irrational than many broader attitudes toward the sacredness of life) characterize the most responsible of recent…

Describes a laboratory experiment in which the students construct and calibrate ion-selective electrodes, then use them to analyze an unknown. (MLH)

Describes an experiment that utilizes a potentiometric, redox titration in N, N-dimethylformamide. (MLH)

Describes a simple experiment using an inexpensive RCA 931A photomultiplier, in which a measurement of the secondary electron emission coefficient is measured at the last dynode. (MLH)

Describes eleven laboratory experiments, including the catalytic effect of copper in zinc-acid reaction; a study of the rate of polymerization of some aldehydes; and a demonstration automatic potentiometric titrator. (MLH)

Describes a laboratory procedure for separating a mixture of plastics representative of scrap plastic using various solvents and solubility techniques. (MLH)

Described is a simple apparatus to determine acceleration due to gravity. It utilizes direct contact switches in lieu of conventional photocells to time the fall of a ball bearing. Accuracies to better than one part in a thousand were obtained. (SL)