Israeli tenth-grade students completed a chemistry laboratory course by either performing the experiments or by viewing films of the experiments. Among the results of an attitude test given to both groups was that students find personalized laboratory more effective than films in promoting their interest in chemistry. (MLH)

Describes an undergraduate organic chemistry experiment in which papain is used as a catalyst for the stereospecific formation of an insoluble anilide from a racemic benzoylamino acid. (MLH)

Discusses the relationship between adsorption isotherms and elution peak shapes in gas chromatography, and describes a laboratory experiment which involves the adsorption of hexane, cyclohexane, and benzene on alumina at different temperatures. (MLH)

Presented are two science demonstration projects: (1) the simulation of a magnetic survey utilizing a bar magnet buried in a sand box and (2) an investigation of the reaction between lead nitrate and sodium hydroxide. (SL)

Described is the construction and utilization of a Dewar assembly for measuring the heat of vaporization of liquid nitrogen. The device is fabricated from a thermos bottle replacement filler. (SL)

Describes a study in which participants in a summer institute for secondary science teachers performed a series of experiments with a radio telescope. Concludes that a radio astronomy teaching facility would encourage students to use their own initiative and strategy in working with the scientific concepts involved. (MLH)

Includes five brief articles on: solar-heating demonstration equipment, mercury or sodium vapor lamp spectroscopy, an apparatus for simulating variable stars, a voltage-to-frequency converter, and an introductory absorption experiment for low-energy beta particles. (MLH)

This selected collection of How-To-Do-It articles published in the American Biology Teacher during the past six years presents experiments that can be conducted safely under properly trained and responsible teacher supervision. Contents include: (1) "General Biology and the Nature of Science"; (2) "Cells and Molecules"; (3) "Microbes and Fungi";…

Discusses the theory and experimental procedures for using Young's eriometer to determine the diameters of blood corpuscles, lycopodium powder, and wool fibers. (CC)

Presents theoretical fundamentals of the experiment on the multiple reflection of helium-neon laser beams from a black-surfaced mirror. Further applications to student projects are indicated. (CC)

Discusses teaching of two project experiments to nonscience students who were asked to measure the acceleration of a system any way they could and investigate any phenomena that they thought might follow a Poisson distribution. Indicates that physics learning performed outside the physics building is the experiment highlight. (CC)

Discusses the philosophy and operation of a self-instructional laboratory at MIT which utilizes visual materials reinforced by audio tapes and is designed to give the student a taste of how to collect, display, and interpret data. Indicates that the approach results in the flexibility needed to serve self-paced courses. (CC)

Discusses the design and operation of a high Q acoustical resonant chamber which can be used to demonstrate wave phenomena such as three-dimensional normal modes, Q values, densities of states, changes in the speed of sound, Fourier decomposition, damped harmonic oscillations, sound-absorbing properties, and perturbation and scattering problems.…