Presents seven notes on new equipment, techniques, or materials of interest to teachers of physics. A circuit of a low-cost computer terminal to audiovisual device interface, and a demonstration of the buoyancy of air are among notes presented. (HM)

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

Describes an inexpensive photo transistor timing system, apparatus for measuring muzzle velocity, and an apparatus for exposing modes of coupled oscillators. (SL)

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)