Explains how CTR Wilson cloud chamber experiments can be simulated with simple low-cost apparatus. Described are the Wilson cloud chamber, colour rings, measurement of rings, and the apparatus. (DS)

Described are several experiments, for a course in geometrical optics or for a college physics laboratory, which have a bearing on ophthalmic optics. Experiments include the single thin prism, crossed prisms, and the prismatic power of a lens. (Author/DS)

Describes methods for studying the direct effect of thyroid hormones on the induction of metamorphic change in amphibians. (CS)

Describes several different philosophies of mind with each philosophy's explanation of the mind-body problem. Philosophies discussed include dualism, materialism, functionalism, radical behaviorism, logical behaviorism and central-state identity. (DS)

Presents three notes on new equipment, techniques, or materials of interest to teachers of physics. (HM)

Described are 15 events that take place during a physics olympics at a Michigan high school. These events are planned with the idea of involving the older students in designing and presenting projects to ninth graders, and involving the latter in a day of outdoor participation. (SA)

Presented is a short discussion of factors causing color changes in animals. Also described is an activity which may be used to demonstrate the response of amphibian skin to a melanophore stimulating hormone in high school or college biology classes. (PEB)

Describes an electronic technique for making a series of timing measurements in quick succession, using the signal from one photodiode. Two undergraduate experiments, one on linear momentum and the other on angular momentum conservation, are included. (HM)

Discusses how the topic of surface water waves can be used in an introductory physics course. Applications in marine science are described. Formulas and activities using a ripple tank are discussed also. (CS)

Describes an experiment which illustrates the general aspects of intermolecular energy transfer between triplet states in rigid solutions of organic compounds solved in an ethanol-ether mixture. Measurements of quenching and energy transfer processes are made using the chemicals of benzophenone and naphthalene. (CS)

This undergraduate biochemistry experiment introduces the student to techniques for cell lysis and release of protein from the cell in soluble form, ion exchange and gel chromatography, and dialysis. (Author/BB)

Describes an experiment suitable for an instrumental analysis or quantitative analysis course. (BB)

This experiment can be used as either a demonstration or a laboratory activity illustrating the principles of affinity chromatography to purify an enzyme. (BB)

Describes a physics exercise designed for biology and premed majors. The activity is a low intensity laser light scattering laboratory exercise to determine the diameter of micron-sized latex spheres (simulated microbes) in water suspension. (GA)

Presents a recipe for the Nylon Rope Trick, which is considered to be one of the most spectacular demonstrations in chemistry. Materials for growing the polymer and some safety precautions are given. (SA)