Instructions for the construction of the following apparatus for the secondary school science laboratory are included in this issue of the Scottish Schools Science Equipment Research Centre Bulletin: a cheap water purifier using an expendable deionizer can; a simple amplifier suitable for detecting or displaying D. C. currents of 1 microamp or…

Provides descriptions, including prices and features, of many of the scientific instruments displayed at the 1976 Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy. (MLH)

Briefly described are materials, equipment, and publications related to science. Sources of the items are indicated. (RH)

Articles describing construction of an inexpensive spectrograph, improving focusing of Polaroid cameras, use of space satellites for instruction, and construction of an optics demonstration platform. (RH)

Describes an inexpensive technique which can be used to convert a slide projector into a polarized light source. (CP)

Describes a set of experiments that uses a low-power gas laser to demonstrate difficult physical and mathematical concepts. (MLH)

Explains the overall structure and the main duties of the Education (Co-ordinating) Committee and its four standing subcommittees: Examinations, Safeguards, Apparatus, and Primary Science. Some specific activities of the committees are mentioned. (GA)

Describes the necessary procedures and equipment needed to modify the American Association of Physics Teachers' (AAPT) pocket calculator timer so that it can be controlled photoelectrically. (SL)

Describes the use of inexpensive polarimeters in laboratory experiments for general chemistry courses. (SL)

Describes a seven piece modular optical hit which can be utilized to demonstrate different optical instruments and a method for observing interference fringes from the surface of a mirror. (SL)

Reports on a recent meeting of marine curators in which data dissemination, standardization of marine curating techniques and methods, responsibilities of curators, funding problems, and sampling equipment were the main areas of discussion. A listing of the major deep sea sample collections in the United States is also provided. (CP)

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

Reviews the potential of a data acquisition system for illustrating the nature and significance of ideas in digital signal processing. Focuses on the fast Fourier transform and the utility of its two-channel format, emphasizing cross-correlation and its two-microphone technique of acoustic intensity measurement. Includes programing format. (ML)

Describes construction and operation of an inexpensive signal generator and a four-electrode electrochemical cell for use in voltammetric experiments. Also describes construction and operation of a four-electrode electrochemical cell used to illustrate elimination (or minimization) of background currents due to electrochemical reactions by species…