Discusses need for introducing material to educate students about the relationship of philosophy to physics and science in general, particularly in light of quantum mechanics. Suggesting the dual nature of electrons as a starting point and citing several supplemental texts, a demonstration is described to be used to introduce the topic. (JM)

Provides background information on and experiments for determining the spectra of streetlights. Procedures for taking photographs of the spectra produced are included as well as discussions of sodium and mercury spectra. (JN)

Examines the assumption that students use a level of reasoning, when solving problems, that is substantially below their intellectual capacity. The study involved 466 college students enrolled in a general chemistry or a physical science course. The results include a comparison of science and non-science majors. (GS)

Describes an experimental method of isotope dilution analysis that determines radioactive compound volume rather than mass. Suitable for degree-level biology and chemistry students. (MLH)

Describes an experiment that utilizes an acidic ion-exchange-chromatography column to separate two cobalt complexes. (MLH)

A follow-up study of teacher education programs in earth science reveals few changes in instructional methods and course requirements, and shows little progress in adopting nationally-developed recommendations for an interdisciplinary approach. (MLH)

Reviews the science education literature on (1) the developmental level of adolescents, (2) the relationship between cognitive development and science achievement, and (3) the implications of Piagetian studies to science teaching at the secondary and college level. (MLH)

Presents an undergraduate experiment that uses ion-exchange techniques to recover the silver chloride precipitate from argentimetric determinations of chloride ions. (MLH)

Discusses the theory of radiometric force and the historical development of the radiometer. (MLH)

Discusses some current research on hemoproteins, describes the process of metal replacement in hemoproteins, and reviews the preparation of cobaltmyoglobin. (MLH)

Describes an experiment in which two organic compounds having the same nmr spectra are identified by their differing mass spectra. (MLH)

Describes an experiment in which the photooxidation of methionine using free methylene blue as the sensitizer is applied to the isolated amino acid or to the methionyl residues of a complex polypeptide. (MLH)

Discusses ten methods for measuring the thermal expansion of solids and the way in which the expansion coefficient relates to other properties of matter. (MLH)

Discusses the teaching potentialities of scaler-timers in the physics laboratory, and describes the circuitry and design of scaler-timers. (MLH)