The sequence of events preceding the actual discovery of oxygen is reviewed; the circumstances surrounding the discovery and isolation of oxygen by Priestley are examined; and the experiments he carried out are described largely in his own words, taken from his books and papers. (DT)

Describes a chemiluminescence system which can be used to demonstrate the effects of certain factors which affect the rate of reaction (temperature, concentration, catalysis, solvent, etc.), and to perform experiments relevant to the mechanism of the system. (SLH)

Describes a technique which enables the student to observe the relativistic behavior of electrons in a gamma ray detector and compare his results with the classical and relativistic predictions. Shows that it is possible to unambiguously determine the electron's momentum by knowing the Compton edge and photopeak energies of a gamma ray energy…

Second grade children, divided into high and low achievement groups, were tested on a visual vigilance task in which stimuli occurred 24 times in 30 minutes. High achievers responded correctly more often. (ST)

Children's avoidance responses were conditioned and then extinguished in a laboratory analog of a social threat situation. (DP)

Describes an experiment in which the free-electron cyclotron resonance of electrons trapped in a microwave cavity by a Penning trap is observed. The experiment constitutes an attractive alternative to one of the Gardner-Purcell variety. (Author/GS)

This manual provides numerous experiments for college-level microbiology students illustrating the basic principles in phage, tissue culture, and animal virology. (CS)

A required senior-level chemical engineering course at Colorado State University is described. The first nine weeks are devoted to the theory portion of the course, which includes the following topics: LaPlace transformations and time constants, block diagrams, inverse transformations, linearization, frequency response analysis, graphical…

This paper describes open-ended experimentation with the fungus Pilobolus for laboratory work by high school students. The fungus structure and reproduction is described and sources of the fungus are suggested. Four areas for investigation are suggested: the effect of a diffuse light source, the effect of a point light source, the effect of light…