Presents: (1) method for tuning sonometers with a VELA and sensing device; (2) computer simulation of two-dimensional gas diffusion; (3) inexpensive procedure for digitizing with better than 0.5mm precision (with program listing); and (4) a simple optical diffraction analogue apparatus for use with the laser. (DH)

Describes: (1) thermometric titrations; (2) EM-5 equipment (consisting of a thermal sensor, calorimeter, and input-buffered amplifier); (3) acid-base titrations; (4) precipitation titrations; and (5) redox titrations. Detailed procedures are included. (JN)

A simple device used to demonstrate the main features of primary color addition is described. Materials needed to construct the device, procedures used, and typical results are discussed. (JN)

Bank Street Laboratory (a set of hardware/software tools for measuring temperature, light, and sound) consists of a board that plugs into Apple microcomputers, cabling, software, and six probes. Discusses the laboratory's hardware, including the analog-to-digital converter, multiplier chip, and modular connectors. Circuit diagrams of components…

Describes an electronic thermometer using a precision temperature sensor (includes detailed schematic of circuits) and inexpensive ring holders for round-bottomed flasks. Also describes a method for reducing funnel breakage. (JN)

Advantages of computerized data acquisition and three approaches to data collection are discussed. Interfacing techniques and use of microcomputers as physiological recorders are also discussed. Examples of computerized data acquisition are provided. These include computer monitoring of animal activity and collecting data from species distribution…

A 16K Sinclair ZX81 microcomputer equipped with an analog to digital board and a Sinclair printer was used to capture data continuously from a total of eight temperature or light sensors. Describes the construction of the peripherals, explains how to connect them together, and provides a program to run the ZX81. (Author/JN)

Describes a three-step method to acquire elementary school classroom equipment by collecting recyclable materials from parents. Step One involves inventory, listing needed materials, and deciding on storage; Step Two, timing and introducing the project through various media; Step Three, cleaning, sorting and storing materials. (CS)

Describes a program for purchasing materials in which local merchants and schools cooperate for the convenience of the teachers who must stock science supplies. (MLH)

Discusses the advantages and benefits of the audio-tutorial method of instruction in science, examines the kinds of secondary science programs that can be developed and the necessary equipment, and suggests the steps that should be followed in developing an audio-tutorial program. (JR)

The first part of a two-part article describes an experimental approach that can be used in teaching the concept of saturated vapour pressure. This leads to a discussion of refrigeration cycles in the second part of the article. (JR)