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)

This article defines high technology, identifies some of the reasons it should be studied, and suggests some ways that it can be studied in industrial arts/technology laboratories. These suggestions include identifying topics for study, gathering information, organizing information, performing laboratory activities, and presenting the study. (CT)

Describes a computerized grading system using mark-sense cards to record experimental data. Gives hardware requirements, provides estimated budget, and lists experiments for which mark-sense cards have been developed and are available. Discusses the grading process and programs. (JM)

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)

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…

Social behaviors of 10- and 12-month-old infants were studied as a function of experimental context (home and laboratory) and experimental history (home rearing and day care). Results suggested that the experimental context influenced infant social behaviors. No differences attributable to rearing condition as a main effect were found. (Author/SB)

Describes the construction and use of two pieces of equipment for teaching materials related to the propagation of an electric field and the parallel plate capacitor. (GS)

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

Describes the development and provides an example of the type of student investigation that is now considered sufficient for the practical part of the 'A' level physics examination. (GS)

Discusses the preparation and properties of nitrogen oxides and the reaction of magnesium with nitric acid. (MLH)

Discusses a multipurpose organic chemistry experiment that illustrates a variety of reaction types within a single, three-hour laboratory period. (MLH)

Describes the determination of vanillin and of other aromatic aldehydes by amperometric titration with 2, 4-dinitrophenylhydrazine. (MLH)

Describes a method in which metals can be identified by the direction of the e.m.f. generated when the junctions in a circuit containing two dissimiliar metals are at different temperatures. (MLH)

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