Described is a project which measured the parameters of the moon's orbit and the moon's size with various equipment, photographs, and calculations. The goals for this project included: completion within a 6-8 week period, reliance on existing equipment and data obtained, and provision for hands-on experience to advanced high school students.…

Presents a survey of the scientific basis for single crystals production, discussing some of the theoretical and experimental advances in the area. Future prospects for semiconductors, magnetic lasers, nonlinear optics, piezoelectrics, and other crystals are surveyed. (Author/CS)

Describes a method using lap-dissolve slide techniques with two or more slide projectors focused on a single screen for presenting visual effects that show structural features in extended arrays of atoms, or ions involving up to several hundred atoms. Presents an outline of an introduction to the structures of crystalline solids. (CS)

A procedure is described for providing preparations of dividing cells from root apical meristems, requiring only inexpensive equipment and minimal experimental skill, and using 8-Hydroxyquinoline and Toluidene-blue as a chromosome stain. The method has been sucessfully tested in schools and yields permanent preparations of adequate quality for…

Described is Western Australia's elementary and secondary science education programs relative to science content, emphasis on science, instructional goals, and science curriculum materials utilized. School enrollments and the demand for highly trained technical personnel in Western Australia are also discussed. (DS)

Discusses certain pitfalls regarding the uncertainty relation between angular momentum and the angle variable from a pedagogic point of view. Further, an uncertainty relation has been derived for these variables in a simple and consistant manner. (Author/HM)

Presents a general treatment of scalar diffraction theory and discusses some concepts which yield new insight into the phenomena of diffraction throughout the whole space in which it occurs. (Author/HM)

Presents three notes on new equipment, techniques, or materials of interest to teachers of physics. (HM)

Discussed is the nature of cyanide poisoning. Included are sources of the cyanide ion, the mechanism of poisoning, the biochemical basis for treatment, and therapeutic measures. (BT)

Describes the history of arsenic, the properties of arsenic, production and uses of arsenicals, arsenic in the environment; toxic levels of arsenic, arsenic in the human body, and the Marsh Test. (BT)

Listed are textbook errors, by numbered topic, which have been noted in the Journal of Chemical Education since 1966. This index supplements a previous one published in June 1967. Appended is a subject matter index as well. (CS)

Materials designed for teachers and handicapped children in the least restrictive settings are reviewed. Brief descriptions are given for materials on science instruction; arts and humanism; expressive arts; social studies units incorporating dance, music, and the visual arts; and functional and basic skills. (CL)

Studies the elastic linear collision of three bodies of equal mass. One of the bodies is incident on the other two which are at rest and in contact with each other. (GA)

The paper shows how various evaluation information, received through a number of feedback sources was used for revisions made in curriculum materials. The value of the results provided by the various evaluation instruments is discussed as well as how each technique validates the outcomes received from the other techniques and illuminates a…

Changes, reactions, deductions. Five simple experiments add new skills and excitement to science. (Editor)