Describes an apparatus for quickly demonstrating the quantum effect of freezing the rotational energy of molecular hydrogen. (SL)

Describes a method of recording galvanometer deflections when using a d'Arsonval galvanometer to demonstrate forced, damped simple harmonic motion. (SL)

Describes apparatus utilized to demonstrate physics principle. Equipment described includes a low pressure chamber, a 360 degree loop ramp, a tilted table demonstrating motion principles, and a method for casting a three dimensional display of magnetic lines of force. (SL)

Provides an annotated bibliography of recent journal articles, books, audio-visual materials, laboratory materials, and further resources suitable for use in secondary school astronomy courses. (CP)

Details the construction and operation of a high quality, low cost piece of apparatus to determine oxygen concentration in water. (CP)

Reviews the usage of Genecon, a hand-operated generator, in science laboratory experiments, such as the relationship between motor and generator effects, the system's efficiency, Joule heating, and conversion of mechanical energy into electrical potential energy. Provides the address for purchasing the Genecon and accessories. (YP)

Introduces several one- and two-mode vibrating systems for demonstrations. Provides some recommendations for designing the corridor apparatus. (YP)

Outlines a laboratory exercise that makes use of Beer's Law plots of cysteine constructed at several pH values over a broad range of wavelengths to estimate the tautomeric ratio (R) of two singly charged ionic forms, calculate the microscopic constants, and construct ultraviolet spectra for both light absorbing species. (CW)

Explains the use of an accelerometer in investigations confirming Newton's second law. Provides diagrams and descriptions of the apparatus. (ML)

Reviews the main principles of interfacing and discusses the software developed to perform kinetic data capture and analysis with a BBC microcomputer linked to a recording spectrophotometer. Focuses on the steps in software development. Includes results of a lactate dehydrogenase assay. (ML)

Proposes an analog circuit for use in sedimentation analysis of finely divided solid materials. Discusses a method of particle size distribution analysis and provides schematics of the circuit with list of components as well as a discussion about the operation of the circuit. (JM)

Describes use of a Fresnel biprism to demonstrate double-slit interference with polarized light. Discusses polarization and phase properties of a randomly polarized gas. (JM)

Describes an experiment in which a microcomputer was programed to function as a transfer function analyzer to investigate the dynamics of stirred vessels. The main objective of the experiment is to illustrate the theory and application of the pulse test (a method of determining the transfer function of a process). (JN)

Describes the use of integrated circuit voltage regulators in electrolytic titration instruments. (MLH)

Described is the equipment and procedures used to prepare and display petrological (thin rock) sections without the use of sophisticated apparatus. (SL)