Subjects (N=43) aged 50 and more were tested on a Sternberg recognition-memory task to explore the relative effects of depression and altered brain function on short-term memory in later life. Many performance differnces were best accounted for by the additive effects of depression and educational background, rather than by either variable…

Describes a heat transfer experiment that demonstrates kinetic behavior using measurements of the rates of cooling and warming of liquids. (MLH)

Describes a college-level course on winemaking and brewing offered to both the academic and the non-academic community. Discusses fermentation and the processing of wine and beer. (MLH)

Describes an experiment that demonstrates the following principles and reactions: amphoterism, oxidation-reduction, equilibrium dependence on pH, solubility, and polymerization. The experiment involves the oxidation of chromium and the precipitation of a chromate salt. (MLH)

Describes an undergraduate physical chemistry experiment in which the kinetics of the various reactions involved in the flash photolysis of water are analyzed on a computer. (MLH)

Describes a straight-forward method of measuring the absolute value of the conductance of an electrolyte solution using direct current and applying Ohm's law. (MLH)

Suggests classroom projects for investigating the diversity of insects. (LS)

Describes how the principles of reactor analysis can be used to study human circulation. (MLH)

Describes an undergraduate experiment that provides instruction in nuclear magnetic resonance (NMR) spectroscopy, reaction rates, and the application of mathematical procedures. (MLH)

Describes a natural-products experiment involving steam distillation, solvent extraction, and spectroscopic identification. (MLH)

Describes a laboratory experiment in which the experimental data agree well with the empirical law. Demonstrates that transparent materials reflect light. (CP)