Includes description of a light meter, photometer, fluid flow apparatus, and acoustic grating. (RH)

Describes apparatus for demonstrating wave motion in a ripple tank, the conservation of momentum on a linear air track, and velocity distribution in an ideal gas simulator. (SL)

Presents information on a centrifugal force apparatus, signal averaging with a minicomputer, and the use of an air track. (MLH)

Presents four notes that report new equipment and techniques of interest to physics teachers. These notes deal with collosions of atoms in solids, determining the viscosity of a liquid, measuring the speed of sound and demonstrating Doppler effect. (HM)

Describes (1) a rippler assembly which makes use of a loud speaker and a stroboscopic light source designed for this application; and (2) an experiment using a force table that has been modified for a capstan experiment. (JN)