The electrode is a lead dioxide-silver plated wire. Construction of the electrode is simple, straightforward, and provides valuable laboratory experience. (Author/BB)

This product review discusses trends in the development of hand-held learning aids, including calculators. Two electronic spelling aids are described. Features include a speaker through which the machines respond to entries. (Author/MP)

Describes a demonstration for measurement of biophysical signals produced by the human body. The signals, after amplification, could provide acoustical feedback through a voltage-controlled oscillator (VCO), or they could be seen either with an oscilloscope or a high speed chart recorder. (GA)

Describes the apparatus used and the experiments performed by a blind student in a freshman analytical chemistry course. (GA)

Describes a physics course where students visit industrial and government scientific research laboratories. The aim is to familiarize the students with research tools available, and to make them understand the potentials, limitations, the functioning principles, and the design features of the instruments. (GA)

Explains some experiments involving thermal methods of analysis for undergraduate chemistry laboratories. Some experiments are: (1) the determination of the density and degree of crystallinity of a polymer; and (2) the determination of the specific heat of a nonvolatile compound. (HM)

Reports the recommendations of the annual American Institute of Biological Sciences (AIBS) meeting at the University of Georgia. Suggests that biologists should become more involved in land use planning and resource allocation in the Southeast. Presents a seven-step process for land-use decision-making. (MA)

This paper describes a method of providing additional and supportive practice time and cultural entertainment programs to the student by means of a service of a campus FM radio station. (Author/NCR)

Describes a blood coagulation test developed by two high school biology students. Although the test lacks some precision, results indicate that the technique is comparable to standard methods used in laboratories. (MA)

Describes an experiment utilizing the Solvay synthesis of sodium hydrogen carbonate to teach students to organize and plan a synthesis procedure. (SL)

U.S. colleges of pharmacy were surveyed in 1976 to determine whether a trend exists in continuing, discontinuing, or restructuring laboratory time in pharmaceutical education. Data regarding core undergraduate pharmacology courses, undergraduate pharmacology laboratory status, and pharmacology faculty are presented. (LBH)

Provides a list of scientific laboratory instruments and equipment and the names and addresses of their manufacturers. Instruments appear in alphabetical order with the names of manufactures listed below each. (SL)

Provides an alphabetical listing of manufacturers of scientific equipment with addresses and phone numbers. (SL)

A description of an experiment testing the effectiveness of three types of language laboratory equipment: Type A is an instant playback of the student's response; type B an instant playback of both recorded material and responses; and the third, long delay playback. Type A was found to be most effective. (AMH)

Safety checklists (week, term, annual) for secondary school science departments are provided. (CP)