Actin and myosin have now been demonstrated to be important constituents of many eukaryotic cells. Their role is primarily that of a contractile system underlying all aspects of cellular motility. Described here is a simple experimental system to demonstrate quantitatively aspects of motility and its regulation in a slime mold. (Author/MA)

Describes a photochemistry experiment involving the quenching of uranyl luminescence by alcohols. (SL)

An experiment on the heat conductivity of different materials are described. Applications for energy education in the elementary classroom are implied. (MDR)

Presents a method for demonstrating Seebeck, Peltier, and Thomson effects in a single experiment. (SL)

Discusses the need of introducing corrections due to wire stiffness arising from end constraints and wire axis distribution curvature in the measurement of ac electrical frequency by exciting transverse standing waves in a stretched steel wire. (SL)

Presents an apparatus for demonstrating two-dimensional random motion suitable for illustrating molecular phenomena. Three specific uses are presented. (SL)

Sticks, string and observation start children off on the bare bones of human biology. (Editor)

The experiments reported here are aimed at exploring in more detail the possibility that context can improve perception itself. In particular, they are concerned with clarifying the conditions under which context might aid perception and with localizing the stage of processing at which context would have its effects. (Author)

These experiments were designed to assess the linguistic performance of the right hemisphere by using reaction time (RT) to measure the flow of information in the normal brain. RT to lateralized stimuli has proved to be a powerful tool for detecting functional differences between the hemispheres on a variety of cognitive tasks. (Author/RK)

Two free-recall experiments were performed in which the subjects were required to rehearse items an equal number of times, but the number of items presented at a given time was varied. The main hypothesis was that increasing the number of items presented at once would increase processing demands and decrease performance. (Editor)

The generalizability of the Fishbein model for behavior prediction was extended to a new field of behavior, alcohol drinking by adolescents. This research investigated the predictive importance of the model's two components, attitudes and normative beliefs. (Editor/RK)

An introductory biophysics course for science students who have previously taken two quarters of noncalculus physics is described. Material covered emphasizes the physical principles of sound, light, electricity, energy, and information. (Author/CP)

The authors give directions for comparing the rates of zero and first order chemical reactions to the rate of flowing water in simple physical systems. They also show how to compare chemical equilibrium to the level of water in a u-shaped tube. (AJ)

Describes a method of calculating the power applied to an electric lamp by using a calorimeter to measure the energy radiated by the lamp. (SL)

These experiments are addressed specifically to the question of whether transituational transfer of immunizing and therapeutic effects will occur when these procedures involve responses and settings which are very different from those used in final testing. (Author/RK)