Based upon recent relativistic theory, the researcher describes the search for tachyons, particles having velocities greater than that of a light. The properties of these particles are speculated upon. The author delineates the difficulties anticipated in their detection and the assumptions underlying their methodology. (RR)

Describes the construction and operation of an overhead projection apparatus designed to demonstrate streamline flow of a liquid. The apparatus consists of a Plexiglass tank containing water in which plates forming the cell are submerged, a constant level reservoir, an overflow device and a system for marking the flow lines with a dye. (LC)

Provides an alphabetical listing of laboratory instruments and equipment and the names and addresses of their manufacturers. (CS)

Presents data on the special needs student gathered during a national survey on industrial arts education. Areas include accommodation, enrollment, funding, and laboratories. (CT)

The design, construction, and operation of a solid state electrometer is described. The instrument used the case and meter movement from an obsolete commercial pH meter. The cost of materials, purchased in 1977 in unit quantities, was $60. (BB)

Describes the construction of a thermostat of double-oven design that can maintain a stability of two mdeg for several hours and can accomodate sealed-glass ampoules at elevated temperatures. (MLH)

Describes a temperature control system that can be used with a double-oven thermostat to provide two mdeg regulation over several hours. (MLH)

Describes an inexpensive apparatus for packing liquid and gas chromatographic columns of high efficiency. Consists of stainless steel support struts, an Automat Getriebmotor, and an associated three-pulley system capable of 10, 30, and 300 rpm. (MLH)