Discussed is a science project in which secondary school physics students constructed a radio telescope to use in the study of radio astronomy. (PEB)

An electronic device is described which can be used for demonstrations and laboratory work in Fourier synthesis, phase and group speeds, beats and modulation, and Lissajous figures. The hardware required is inexpensive and simple. (Author/RH)

Discussed are past work and recent advances in the use of electron microscopes for viewing structures immersed in gas and liquid. Improved environmental chambers make it possible to examine wet specimens easily. (Author/RH)

Describes a remote air sampling device constructed of a number of spring loaded syringes which are released sequentially by the motion of a rotary mechanical timer. The unit can take accurate samples automatically and contain the samples without leakage for periods up to 18 hours in an outdoor environment. (SLH)

Presents information about new apparatus, equipment, and literature. Equipment includes such things as an educational computer, computerized analyzer, gas chromatograph, and laboratory extruder. New literature includes catalogs and pamphlets presenting technical data and procedures in areas such as water analysis, titrimetric procedures and…