Describes activities by which the porosity and permeability of materials with respect to water can be measured. (CP)

This article describes how Robert LeBleu's interest in aquatic life developed and that today he owns a large hydroculture operation supplying research crayfish nationwide. Suggested laboratory experiments with crayfish are described, as well as information on additional studies, equipment needs, and tours of the hatchery. (MA)

In a project designed to enable women to gain mathematical skills needed to expand their career opportunities, a special section of a college algebra course was offered. The section was for women only and was specially organized and staffed. Evaluation indicated the project was successful. (SD)

In 1972, Roydes and Osgood studied the tachistoscopic recognition of words that can be used as either nouns or verbs and found an interaction of predominant form class by set to perceive a given form class. Three experiments were done to test the generality of that finding. (Editor)

The effect of the repeated presentation of some items in a free-recall list was examined as a function of instructions to recall repeated or unrepeated items first on tests. (Editor)

This paper is the first of a series of studies that investigate a new multivariate theory of personality types or "styles". This theory suggests that any personality type or style consists of a specific combination of psychological defenses, cognitive and affective styles, belief and value systems, moral development, etc. (Author)

These experiments show two things: (a) In visual memory, long-term interference on a current item from items previously stored only seems to occur when the current item's retention interval is relatively long, and (b) the visual code appears to decay rapidly, reaching asymptote within 3 seconds of input in the presence of an interpolated task.…

Evidence from four studies demonstrates that social observers tend to perceive a "false consensus" with respect to the relative commonness of their own responses. Implications of these findings for our understanding of social perception phenomena and for the analysis of the divergent perceptions of actors and observers are discussed. (Editor/RK)

Experimental computer programs are being developed to teach students at all levels and in a wide variety of training fields and track their progress at the same time. (MSE)

Biomimetic chemistry is concerned with the synthesis of small, molecular weight molecules which mimic the properties of metal-containing sites within certain biologically significant species. A series of experiments for an advanced undergraduate laboratory is described as a way to introduce this area into the chemistry curriculum. (JN)

Described are experiments to give students experience in the synthesis of peptides from amino acids and to use visible spectroscopy to measure a rate of reaction. The activities were designed for undergraduate courses. (RH)

Described is a laboratory activity to determine five unknown organic compounds. The procedures are designed to help students determine unknowns from a series of tests. (RH)

Described is an experiment that uses nuclear magnetic resonance to study the anomalous paramagnetism of iron(III) chelates. (RH)

Describes the kinetic mechanisms of reversible activators of enzymes that normally follow Michaelis-Menten kinetics. Examines reversible activators of the enzyme carboxypeptidase A (CPA). (TW)

Discusses a series of experiments performed by Thomas Hope in 1805 which show the temperature at which water has its maximum density. Early data cast into a modern form as well as guidelines and recent data collected from the author provide background for duplicating Hope's experiments in the classroom. (JN)