Describes physics laboratory equipment including: circuit improvements for an electronic counter-timer, a commercial counter-timer-frequency meter, and a device for demonstrating resonating air columns. (SL)

Describes and evaluates a line of modular electronic instruments that are designed for use in physics instruction, including a power supply, function generator, and counter/timer. (MLH)

Evaluates Thornton's modular electronics system for use in the general physics laboratory. Includes the Thornton pre-set counter-adapter, decade counter, and amplifier-power supply. (MLH)

Describes an electronic digital counter, a speed-of-light experiment using a television, a simple out-of-circuit method for determining if a transistor is made of silicon or germanium, and the use of dry cells to power TTL integrated circuits. (MLH)

Discusses and lists, in table form, the specifications and characteristics of 28 low-cost digital multimeters, including jacks, number of V ranges, max V, cost, approximate percent accuracy, current scales, display, battery life, volume, and manufacturers. Quality of construction, ease of repair, and similar characteristics not reported. (SK)

Descriptions of equipment and procedures are provided for: (1) a detection system for mass-spring oscillations; (2) an economical holography table; (3) demonstration alternating-current circuit board; and (4) demonstration of damped oscillation using a set of magnets. (SK)

Summarizes the advantages in using the Daedalon Air Table, which supplies compressed air to the pucks instead of the table surface itself. Describes methods for constructing an electronic null detector using a Weston type galvanometer and an integrated circuit operational amplifier. Also describes a redesigned and improved sound-level meter. (CS)