Presents two examples of physics demonstrations: (1) vibrating aluminum rod suitable for use in a small room, and (2) vibrating white rubber tubing suitable for use with larger audiences. (SK)

Describes a circuit designed to measure time-of-flight velocity and shows how to use it to determine bullet velocity in connection with the ballistic pendulum demonstration of momentum conservation. (Author/GA)

Discusses parametric oscillators and parametric instability. A simple, easy-to-construct system which exhibits parametric instability is presented. The two lowest-order resonances are described and analyzed in detail. The analysis stresses the physical and intuitive aspects of the problem. (Author/HM)

Briefly describes 30 filmstrips in a series entitled "Experiments in Chemistry," suggested for use in lieu of a laboratory manual. (CS)

Discusses some examples of Fresnel diffraction. Diffraction effects caused by round holes, round obstacles, narrow slits, narrow obstacles, and transparent obstacles are included. (HM)

Describes a Malaysian school project which deals with tin, and extracting tin from its ore in the laboratory, as well as the economics involved and the locating and mining the ore. (HM)

Describes an undergraduate physics experiment for studying Curie temperature and Curie constant of a ferromagnetic material. The exchange field (Weiss field) has been estimated by using these parameters. (HM)

Discusses some basic physical ideas about light scattering and describes a simple Raman spectrometer, a single prism monochromator and a multiplier detector. This discussion is intended for British undergraduate physics students. (HM)

Described is the use of cleavage as an aid to microscopic determination of unknown minerals by immersion methods. Cleavages are examined in relation to fragment shapes, types of extinction, and cleavage-optical relationships. (Author/DS)

Topological ideas can be used to predict a variety of textures and defects in condensed matter systems under certain conditions. This article describes one means of creating and observing textures in liquid crystals which exhibit a rich variety of such textures. The results of these observations are presented. (Author/SK)

Suggests sterile procedures which can be carried out to take a sample of blood (of one or two drops) from pupils to be used in school biology courses in the United Kingdom. (HM)

Describes a circuit which allows vectors and combinations of vectors to be illustrated by means of bright segments appearing on a c.r.o. screen. Explains how to demonstrate dendritic crystalization with cyclohexanol. Presents a circuit which, with the help of a signal generator and an oscilloscope, facilitates the understanding of the electrical…

Describes a physical chemistry experiment that allows students to test the effect of ionic strength on the rates of a reaction between ions. The reduction of hexacyanoferrate III by ascorbic acid is detailed. Comparisons with the iodine clock reaction are made. (CS)

The synthesis of 1,4-diphenylbutadiene by means of the Wittig reaction is presented as suitable for organic chemistry students at the end of a basic laboratory program to apply laboratory skills and display understanding of the use of phase transfer catalysis and its application in syntheses. (CS)

Presents Part II of a description of a computer-oriented course on process control which has been offered at the University of Wisconsin for undergraduate students. Lecture topics and laboratory experiments are also included. (HM)