Suggests that cyclohexane be used as a solvent in experiments usually using benzene, which has been placed on the list of chemicals that are confirmed carcinogens. Reasons for selection of cyclohexane and experimental procedures using this solvent are described. (CS)

Reveals how chemical information in the form of descriptions of the chemical literature and chemical substances can be encoded as digital representations, then manipulated by computers to assist with collection, formatting, and distribution. Explains how computer-based search techniques are used to search databases that supplement traditional…

Describes a compact solar camera built as a one-semester student project. This camera is used for taking pictures of the sun and moon and for direct observation of the image of the sun on a screen. (Author/HM)

Describes a concrete model for teaching the concepts of reflection and refraction without the use of formal mathematics. The model has been tested in five sections of a physics course for nonscience majors at Towson State University, Baltimore, Maryland. (HM)

Described is a sensible and positive attitude toward waste that can both aid the safe, smooth running of a teaching laboratory and also be an important learning tool. (Author/DS)

Described is a method of utilizing the standard ball and stick models, used in demonstrating molecular structure, for building two electron bonding components. Included is the construction of several molecules with word and picture descriptions. (Author/DS)

Describes a technique devised to isolate topics of high perceived difficulty in a school biology syllabus. Discusses results obtained from questioning school pupils, teachers, and university students. (Author/CS)

Reviews development in electronics technology of digital computers, considering the binary number representation, miniaturization of electronic components, cost and space requirements of computers, ways in which computers are used, and types of computers appropriate for teaching computer literacy and demonstrating physiological simulation. (CS)

Presents audiovisual methods to aid instruction in measuring blood pressure by indirect methods, so that a large screen display for cuff pressure is produced and high intensity Korotkoff sounds are amplified. (CS)

Describes a plexiglass and aluminum model of a Wadati zone suitable for classroom exercises and demonstrations in earth science to let students test the hypothesis that earthquake hypocenters near oceanic trenches tend to occur along planes that dip away from the trenches, toward associated island arc or continental mountain chain. (Author/JN)

Discusses how, through a series of sample problems and solutions, the notion of force as momentum flow can serve as the basis for vastly expanding the importance of Newton's third law as experienced by students in elementary mechanics courses. (Author/HM)

Discusses what is meant by a linear program and states and illustrates two of the theorems upon which the methods of linear programing rest. This description is intended as an introduction to linear programing of physics students. (HM)

Discusses how Volta's concept of electromotive force seems to be forgotten. A comparison of the concepts of potential difference and electromotive force is also included. (HM)

Describes a feature of the School of Chemical Sciences within the University of East Anglia at Norwich, which incorporates yearly a visiting faculty member chosen from an industrial or government laboratory. (CS)

Presents evidence to support the author's viewpoint that Einstein's General Relativity Theory is related to concepts of chemo-electricity. (CS)