Describes a magnetic resonance laboratory experiment for a biochemistry course. (SL)

Describes several plasma physics experiments suitable for undergraduate physics laboratories. (SL)

Describes experiments for preparing compounds containing cooper and nickel in the +3 oxidation state. (SL)

Describes experiments with and preparation of Manganese (III) for demonstrating the reactions of ions from the first transition metal series. (SL)

Describes an experiment demonstrating the frustration of totally reflected visible light. (SL)

Describes procedure for making X-ray photographs on Polaroid 3000 black and white roll film. (SL)

Described are nine enzyme essays for distinguishing soil samples. Colorimetric methods are used to compare enzyme levels in soils from different sites. Each soil tested had its own spectrum of activity. Attention is drawn to applications of this technique in forensic science and in studies of soil fertility. (Author/AJ)

Disadvantages of the use of language laboratories in language teaching are pointed out. Ways in which the language laboratory can be used helpfully for the student are suggested. The conclusion is drawn that for secondary schools the language laboratory has little advantage over a tape recorder used in class. (RM)

Language laboratory use has traditionally been limited to structural and phonetic exercises. This article discusses ways to tap more effectively the laboratory's potential, and thus to provide superior language instruction for the student. (Text is in French.) (DB)

The University of Birmingham is equipped with four language laboratories and thirteen private study booths. Use of the laboratories, but not the study booths, declines after the first term of each session. A survey was done gathering data about the users of the private study booths. (RM)

Provides construction diagrams and description of an easily constructed, versatile circuit board. (CP)

This month's article presents three reading skills reinforcement centers that will strengthen your individualized reading program and make it more flexible. (Editor)

Discusses the relative instability of organic oxidants, citing early attempts at overcoming the solubility limitations in organic reaction systems. Describes the more recent introduction of new types of organic oxidant salts that have demonstrated more promising levels of stability, though unexpected explosions have still occurred. (TW)

Shows how the Archimedes method is used to determine the density of a single crystal of ammonium oxalate monohydrate. Also shows how to calculate the density of other chemicals when they are available as single crystals. Experimental procedures and materials needed are included. (JN)

Reports a consecutive first-order reaction for which the concentrations of reactant, intermediate, and products can be determined simulataneously. This reaction is the epoxidation of 2,5-di-tert-butyl-1,4-benzoquinone (I) by alkaline hydroperoxidation using tert-butyl hydroperoxide and benzyltrimethylammonium hydroxide (Triton B) catalyst.…