An electron-spin-resonance experiment which has been successfully performed in an advanced undergraduate physics laboratory is described. A discussion of that part of the theory of magnetic resonance necessary for the understanding of the experiment is also provided in this article. (DT)

Students generally prefer "custom-made" laboratory tapes, as opposed to "traditional" commercially supplied tapes. (LG)

Described are two experiments using electronic circuits designed for the activities. The first experiment is Ruchardt's experiment and the second demonstrates the distribution of velocity of electrons. (RH)

Described is an activity that was developed to measure celestial coordinates. Pictures were taken of the asteroid Vesta, coordinates for reference stars determined, and then celestial coordinates of Vesta were determined with assistance of a computer. (RH)

Response to CS 703 360. (CH)

Potential safety hazards in the science classroom are surveyed. Some of the more potentially dangerous materials are described: mercury, formaldehyde, and black light radiation. The biological hazards of diseases carried by animals and of exposure to petri dish cultures are discussed. Five references on safety are included. (DT)

Presents a multipart experiment utilizing the same two compounds in preparation, interpretation of infrared spectra, and kinetic study. Several extensions of the experiment are included. (SLH)

When developing learning centers for the bilingual bicultural handicapped child, the teacher should consider the child's cultural values before selecting the type of center (content or topic), specifying the objectives, developing activities, providing task cards, arranging the schedule, and keeping records. (CL)

Comments on the article cited above emphasize that in media-aided instruction the main things to remember are the methodological and pedagogical aspects, and not the physical equipment, which leaves untouched the content and the concept of modern foreign language teaching. (Text is in German.) (IFS/WGA)