Presents the author's viewpoints on the role, benefits, and mechanics of performing physics demonstrations. Suggests that teachers keep a demonstration file. Indicates that demonstrations can be set up in showcases or in hallways. (SK)

Includes annotations of articles from previous issues of this periodical on the following topics: balancing equations and nomenclature, the mole, the silver tree experiment, and history of the periodic table. (CS)

Provides procedures appropriate for a high school chemistry class that demonstrate the Arrhenius law by determining the heat of vaporization of a volatile liquid. (CS)

Presents recommendations sent to schools by the Laboratory Safeguards Sub-Committee in the United Kingdom to prevent hazards of a number of chemicals. How to avoid phosphorous fires and accidents from doing dangerous experiments in chemistry are also included. (HM)

Discusses some problem areas as they presently exist in many secondary school laboratories in Australia, and presents some views on how safety in science should be presented to the Australian students. (Author/HM)

Instructions for making a simple respirometer, to measure rates of oxygen consumption of organisms, are presented. The instrument incorporates most of the basic elements of commercial respirometers but can be made inexpensively by high school students. Operating instructions and applications are given. (Author/SA)

Included is information regarding: fabrication of light emitting diodes, their operation as semiconductors, and an experiment demonstrating electroluminescence; experimenting with Random Access Memory (RAM) circuits; demonstrating Coriolis effect; measuring the diameter of an electron beam, E.H.T. meters; launching a trolley by catapult; a "random…

Unusual experiments in sound are described. Sounds produced from the vibration of areas are represented by many beautiful sand patterns. The vibrating areas vary from square to circular plates. (SA)

Explains the origins of quasi-history in physics, and its aims of providing a framework for relevant scientific facts. Presents a large number of examples and discusses their effects on attitudes of students and others toward physics and science in general. (GA)

Describes a new physics program which depends mainly on student performed experiments and investigations, and subscribes to Piaget's learning and developmental theories. (GA)

Presents articles on: the measurement of flouride levels in natural waters; the effect of sunlight on the rate of chlorine decomposition in a swimming pool; and curriculum development in Australian agriculture science. (MLH)

Describes a method for experimenting with both whitening and deacidifying old newspaper clippings using sodium borohydride bleaching. Clippings are soaked in distilled water then immersed in sodium borohydride for 15-20 minutes. After rinsing with distilled water, the paper is washed with saturated Ca(OH)2 solution. Readers should not begin…

Describes chemistry laboratory experiments that can be done with student-designed investigations. Suggests approaches for restructuring traditional chemistry laboratories. (DKM)

Introduces an inquiry-based laboratory experiment in which students identify an unknown bacterial species by using techniques such as Gram staining. Uses an authentic problem solving approach in a scenario entitled, "What poisoned the apple juice?" (YDS)

Describes variations on atmospheric pressure demonstrations and some systematic studies. Demonstrations use steam, generated either externally or internally to the container, to sweep out residual air. Preferred vessels collapsed slowly. Demonstrations use plastic milk jugs set in layers of aluminum foil, pop bottles immersed in 4-L beakers…