Short articles on the alkylation of aniline, the preparation and properties of perbromate, using scrap copper in chemistry instruction, a safe method of burning hydrogen, and the use of an ion-charge model as an alternative to the mole concept in secondary school instruction. (AL)

Short articles describe techniques for stroboscopic photography of moving objects, mechanical and electronic demonstrations of beats at radio frequencies, simple apparatus for the determination of the specific heat of steam, and the measurement of electrostatic potential by a flame probe. (AL)

Reviews the development of techniques for synthesizing perbromate compounds, summarizes their properties, and discusses reasons why they were so difficult to prepare. (AL)

No significant effects of the diagnostic information on empathy were found. Certain clients consistently elicited a greater degree of empathy from Ss. Degree of empathic communication was found to be a relatively stable therapist characteristic. (Author)

Three science departments share lecture facilities in one compact building. (Author)

Describes the coordinated study of European grasshoppers as living specimens in the field and as permanent laboratory preparations for introducing taxonomic principles. Provides details for the preparation of specimens and sample instructions provided to students. Part I of a three-part series. (AL)