Describes a class of ion-selective electrodes that use a solid-state sensing membrane. These are suitable for student activities. (SL)

Discusses topics involved in the selection of an analog-to-digital (ADC) converter and associated front-end signal conditioning hardware. Reviews what types of ADC's are available, best type for particular application, conversion rates, amplification, filtering, noise, and compatibility issues. Suggests purchase strategy and supplies names and…

Suggests how modifications on a mini-compressor can result in a low-cost vacuum filtration system for use with suspended sediments in the field or laboratory. Explains and illustrates the changes needed to make the apparatus efficient and servicable for providing data for mass balance, geochemical exploration, and environmental studies. (ML)

A low-cost personal computer was interfaced with a Benedict-Roth type spirometer to simplify laboratory testing for pulmonary function. Data analysis methods and test reliability are discussed. (PP)

Discussed are various types of electronic laboratory balances. (RH)

Describes a laboratory experiment in which the students construct and calibrate ion-selective electrodes, then use them to analyze an unknown. (MLH)

Described are available electronic laboratory balances. Information was supplied by the manufacturers or importers. (RH)

A variety of materials are described including spectrophotometers, chromatographs, voltmeters, recorders, and simple laboratory equipment. (RH)

Describes a simple experiment using an inexpensive RCA 931A photomultiplier, in which a measurement of the secondary electron emission coefficient is measured at the last dynode. (MLH)

Describes eleven laboratory experiments, including the catalytic effect of copper in zinc-acid reaction; a study of the rate of polymerization of some aldehydes; and a demonstration automatic potentiometric titrator. (MLH)

Described is a simple apparatus to determine acceleration due to gravity. It utilizes direct contact switches in lieu of conventional photocells to time the fall of a ball bearing. Accuracies to better than one part in a thousand were obtained. (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)

The construction, equipment, and operation of a new language laboratory facility at the University of Louisville is described. (RM)

Describes a unified experiment in which an optically transparent thin layer electrode is used to illustrate the techniques of thin layer electrochemistry, cyclic voltammetry, controlled potential coulometry, and spectroelectrochemistry. (MLH)