Describes the construction and operational procedures of a simple setup which enables undergraduate students to conduct experiments on critical phenomena in gases. Indicates that the experimental features are proved comparable to those of the Reamer and Sage apparatus. (CC)

Discusses procedures of using the selective absorption properties of manganese dioxide to prepare a short-lived source from the cerium-144/praseodymium-144 system. (CC)

Describes a method of recording the number of particles scattered at various angles for different impact parameters in an experiment illustrating the Rutherford scattering of alpha particles. (JR)

Describes a simple method of demonstrating the Bernoulli effect, by spinning a length of rubber tubing around one's head. A manometer attached to the stationary end of the tube indicates a reduction in pressure. (JR)

Outlines several exercises suitable for elementary science classes which may be used to illustrate objective experimental analysis. (JR)

Describes experiments using crude isolated chloroplast fractions which demonstrate some aspects of the photosynthetic light requiring process and a number of factors affecting them. These experiments are suitable for senior high school and college courses in biology. (JR)

Discusses experimental evidence for the existence of organic material in the solar system prior to the earth's formation. Indicates that the earth could have received much of its organic compounds from meteors falling on its primitive surface. (CC)

A simple experiment is proposed that can provide the student with some insight into the chemical properties of solids. It also demonstrates the relationship between the Gibbs free energy of formation of an ionic solid and the emf of an electrochemical cell. (DF)

Discusses training recommendations issued by the Chemical and Allied Products Industry Training Board and the two related methods in use. Emphasizes that the technician job is worthwhile in its own right rather than a step toward the technologist level. (CC)

Describes an experiment designed to expose the student to the classical techniques of organic dye synthesis and introduce him to a variety of modern scientific knowledge and exotic physical phenomena which he might not encounter otherwise. (Author/DF)