Describes a simple method for establishing the end point in a volumetric analysis that will save time, and reduce both the titration error and the required amount of reagents. (GA)

For teachers in search of an easily obtainable, readily dissectable, and unique living specimen to arouse the interest of their students and illustrate important biological principles, lichens are the perfect selection. Background information and experiments on lichen anatomy, physiology, and chemistry are given. An appendix gives culture media.…

Exercises are presented for classification of marine algae on the basis of biochemical characteristics such as pigmentation, cell wall components, and food storage products. (BB)

Explains some middle school science demonstrations and experiments: included are a simplified circuit board, a scheme for the identification of plastics, a soot-free bunsen burner, science in a packet of cornflakes, and perceptual ambiguities with a "Chinese Compass." (GA)

Presents an undergraduate physical chemistry laboratory experiment describing the measurement of the proton magnetic resonance spectra. (HM)

Describes the use of Landsat maps in a study to determine the feasibility of supervising student teachers with group telephone conferencing. Project value was determined by cooperating teacher evaluations, student-teacher comments, and pupil achievement. (MA)

A workshop exposed elementary teachers to activities from three contemporary elementary science programs. (MP)

A description of teacher-made shoe box kits covering science concepts in grades four to eight. (CM)

Describes a series of science activities involving dissection and analysis of a sea necklace. (CP)

Describes an experiment for the measurement of the reflectances of dielectric surface. The experiment is analyzed in terms of the Stokes parameters and the Mueller calculus, and Malus law is derived. The experiment also provides an introduction to the properties of real linear polarizers. (Author/GA)

Describes an experiment in which a point source of light, when viewed through a cylindrical tube having reflecting inner walls, appears as a series of sharply defined rings, due to the multiple reflections from the inner walls of the tube. ( GA)

Experiments to measure range, range straggling, stopping power, and energy straggling of alpha particles are discussed in this article. Commercially available equipment with simple modifications is used for these measurements. (Author/GA)

Describes the preparation of suitable solid electrolytes and cells which may form the basis of a laboratory teaching program designed to illustrate a variety of electrochemical ideas. ( Author/CP)

Suggestions on the preparation of various kinds of glass and a demonstration of burning magnesium and dry ice are presented. (CP)

Describes a synthesis of chrysanthemic acid which has been used successfully in a laboratory course. (Author/CP)