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)

This article describes the procedures, rationale, and consequences of the steps employed in developing an inhouse instrument to measure achievement in a local career education project. The article attempts to enumerate, clarify, and justify in terms of accepted measurement principles the steps taken in developing an inhouse achievement test.…

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)

This study designed the Environmental Chemistry Value Preference (ECVP) instrument to assess the value preferences of college non-science majors with respect to certain aspects of environmental chemistry and used the instrument to obtain the value preferences of various groups of non-science majors who had completed some chemistry courses. (BT)

Discusses the increased environmental activities of the National Bureau of Standards which include the development of standard reference materials (each containing a known concentration of a pollutant or pollutants), accurate methods of measurement, and pollution monitoring instruments. (JR)

Discusses a light scattering instrument designed to measure the size of particles in an air flow in approximately 25 microseconds and at a concentration as high as 10,000 particles/cc. Indicates that the measurement can be made for all particles, independent of their index of refraction. (CC)