Describes an experiment which allows students to observe the four oxidation states of vanadium obtained in aqueous solution. (SL)

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

Describes an undergraduate physical chemistry experiment in isotope separation which utilizes a carbon dioxide laser. (SL)

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

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)

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)

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

Describes a method of determining the molecular weight of a weak acid. (SL)

Describes experiments and apparatus used to study the interaction of falling water drops on water surfaces and the collision between pairs of drops. (SL)

Describes an experiment for determining the blackbody radiation constant hc/k, utilize a conventionally built cavity and a single-beam, single-window Perkin-Elmer 12-C model spectrometer. (SL)

Described is the life cycle of the cellular slime molds Acrasiales. Experiments that can be used to explore the aggregation, migration, and culmination activities of the organism are suggested. Laboratory procedures for culturing these slime molds and listings of biological supply houses and literature references are also given. (MA)

With the development of sophisticated techniques in the biology of conception, fetal research, sustaining life after functional death, and abortion, legal and ethical questions face the medical community. (JD)