Describes basic laboratory procedures in a secondary level experiment designed to relate ionic and descriptive chemistry. (SL)

Describes experiments used to illustrate the kinetics of reversible chemical reaction. (SL)

The Utah Superintendency of Indian Affairs experimented with a system of Indian farms to feed the Indians of the territory and to provide a suitable environment for their acculturation. While the experiment served to control and pacify some of the Indians, it did not convert them to the sedentary life of cultivators of the soil. (NQ)

Using the simple optical system and photodiode described in this article it is possible to give clear, quantitative demonstrations of all the Fraunhofer diffraction phenomena at single and multiple apertures. These measurements can be related to the theoretical predictions given in standard textbooks. Circuit diagram and optical layout are…

Describes experiments for determining the dielectric constants of liquids and measuring capacitor dissipation. (SL)

Describes an experiment using flow densimetry for determining the solution concentration in equilibrium with the excess solid solvent present. (SL)

Describes an inexpensive device for students to measure Planck's constant using the photoelectric effect. (SL)

Describes experiments simulating the mechanics of the human elbow and back. (SL)

Presents results of analyses of flat and conical depressed target surfaces used in a bouncing ball experiment. (SL)

Describes experiments demonstrating the Josephson effect, single-file diffusion in biological membranes, refractive index of beer, lines of magnetic fields, indexing diffraction patterns, Maxwell's equations, and spherical aberration. (SL)

Cites several examples of research studies in which medical as well as ethical considerations affected the treatments prescribed. The ethical versus the statistical aspects of drug testing are also discussed. (CP)

These experiments attempt to optimize the possibility of demonstrating blocking in a taste-aversion paradigm and to elucidate the conditions under which this interference occurs. (Author/RK)

To complement investigations of the direct effects of lithium toxicosis on consummatory behavior, these experiments were designed to determine the aftereffects on drinking of exposure to a conditioned stimulus previously paired with lithium. (Author/RK)

In four different experiments, brief illumination of a localized visual stimulus was followed by grain presentation unless the pigeon approached the light. Results indicate that although response-reinforcer relations do play a role, stimulus-reinforcer contingencies are the dominant factor in establishing and maintaining approaches to the…

Describes a chemistry laboratory activity for determining the best procedure for analyzing iodide in seaweed. (SL)