Describes the construction of a circuit which directly measures current in a coil of superconducting wire. (CP)

Details construction of an inexpensive electronic auditory device in which the resistance in parallel with the device is inversely proportional to the frequency of sound produced. (CP)

Foreign students learning English often do not correct their own errors when working in the language laboratory. It appears that students fail to respond if the material to be processed, answered or repeated is either too long or cannot be interpreted. A repeat-loop tape system may answer some problems. (CHK)

The University of Southwestern Louisiana has made a previously required language laboratory course an elective course and has changed the regular two-hour-per-week requirement for those who enroll to a twenty-hour semester total requirement. Laboratory equipment presently in use is shown and described. (SCC)

In order to expand the exercise capabilities of the language laboratory, the instructional place of the daylight projector is discussed, with regard to theories of language and of learning, and with attention to defined learning groups, learning goals and the technical possibilities of a combination of media. (Text is in German.) (IFS/WGA)

Describes a cassette tape remedial language laboratory system for improvement in English language articulation. (CH)

Describes how to construct an inexpensive microscope that uses a drop of water rather than a glass bead for a lens. (BR)

Presents some experiences of a physics teacher in inventing apparatus, obtaining patents, starting a company, and going into production. (GS)