Suggests the use of a colorimeter in which heat produced is related to the amperage and voltage measured. In relating the quantities, a definition for voltage can be obtained. (CP)

Describes an inexpensive apparatus used to study the kinetics of fast reactions. Suggests an appropriate reaction for study, and laboratory techniques. (MLH)

Describes ion-exchange methods for the qualitative determination of iron (III), chromium (III), aluminum (III), and manganese (III) and (IV) in the presence of phosphates. (MLH)

Suggests that the anatomy of a green pea be studied as the culminating laboratory activity of a botany unit in a biology course. (LS)

Provides a solution to the Blackwood pendulum experiment by the use of conservation of linear momentum and conservation of energy of translational motion. (CP)

Describes how to assemble a respirometer from common laboratory materials for quantitative measurements of gas production. (LS)

Gives basic instructions for rearing several readily available insect species particularly well suited to use in secondary, and even elementary, school classrooms and laboratories. (LS)

Includes description of a light meter, photometer, fluid flow apparatus, and acoustic grating. (RH)

Describes a chemistry project in which lichens are identified by the analysis of the phenolic substances that they biosynthesize. (MLH)

Describes a machine which demonstrates the statistical bases of chemical equilibrium, and in doing so conveys insight into the connections among statistical mechanics, quantum mechanics, Maxwell Boltzmann statistics, statistical thermodynamics, and transition state theory. (GA)

Proposes an alternative to the classical minimum-deviation method for determining the refractive index of a prism. This new "fixed angle of incidence method" may find applications in research. (Author/GA)

Presents a simplified theoretical analysis of the variation of quantum yield with photon energy in the photoelectric experiment. Describes a way to amplify the experiment and make it more instructive to advanced students through the measurement of quantum yield of a photo cell. (GA)

This experiment is designed specifically for students with little knowledge of radical reactions and provides an introduction to the gas-phase chemistry of radicals. Experimental planning based on the student's own observation is an important component of the experiment. (Author/MA)