A look at an experiment carried out by the University of Pittsburg, dealing with citizen access of commercial television time. (HB)

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…

Article evaluated the merits of the practical test, regarded as a valuable one for measuring aspects of science achievement other than the aspects measured by paper-and-pencil type tests. (Author/RK)

In a previous paper (Hartley and Holt, 1971) the development of a three-minute reasoning test was described, and its validity and reliability assessed. In this paper three experiments are reported which look in greater detail at these aspects of the test in different situations. (Author)

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)

By describing a fictional simulated environment project, this short story demonstrates how an educational innovation may have unexpected and unpleasant consequences. (JG)

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)

Describes the early historical period of the molecular beam method, including the Stern-Gerlach experiment, the work of Davisson and Germer, and the magnetic moment determinations for the proton, neutron, and deuteron. Contains some amusing historical sidelights on the research personalities that dominated that period. (MLH)