Describes the principle of the scanning optical microscope and explains its advantages over the conventional microscope in the improvement of resolution and contrast, as well as the possibility of producing a picture from optical harmonies generated within the specimen.

Discusses the adaptation of some familiar equipment for use in physics demonstrations: demonstrating waves using a folding slinky, measuring the partial pressure of water vapor, lengthening the time constant on a rate meter, measuring "g" with a phonograph turntable, and constructing a cheap signal generator. (GA)

This reaction is used in an introductory organic chemistry course to illustrate principles of gas-liquid chromatography, geometrical isomerism, homogeneous catalysis, and activation energy determinations. (BB)

Discusses the solubility characteristics of bromine salts. (CP)

Describes the active role which regional Japanese laboratories are playing in specific fields of applied research such as: (1) pollution of the sea; (2) developing methods of coping with the exceptional variety of natural disasters; and (3) preparing for earthquake. (HM)

Tested demonstrations on (a) color development through the formation of subtractive primary dyes and (b) fluidity of gases are presented. (CP)

Ethylene hydrogenation on a platinum catalyst, electrolytically applied to a tube wall, is a good system for the study of the interactions between diffusion and surface reaction in heterogeneous catalysis. Theoretical background, apparatus, procedure, and student performance of this experiment are discussed. (BB)

Presents the concluding article on a checklist for chemistry laboratory safety. (SL)

Presents a procedure for testing cholesterol level in patients. (SL)

Describes a device for converting LED digital displays to large-scale displays. (SL)

Describes a device to detect flooding by broken water apparatus and to properly shut off the apparatus and water flow. (SL)

Describes the modification of a transistor radio to make an audio oscillator. (SL)

Reviews the chemistry of methylmercury, methylmercury poisoning, and its treatment. (SL)

Describes a laboratory experiment to analyze wine for its major components using a standard enological analytical procedure. (Author/GA)

A phase catalyst approach to nucleophilic and electrophilic reactions is proposed. (CP)