Describes an experiment in which the beam of X-rays is simulated through the use of a laser as a monochromatic light source and the crystal is replaced by photographically prepared masks. A strong diffraction pattern as large as 20 cm. can be obtained. (GS)

Presents a simple method of analysis in which the student can integrate, point by point, any interferogram to obtain its Fourier transform. The manual technique requires no special equipment and is based on relationships that most undergraduate physics students can derive from the Fourier integral equations. (Author/MLH)

Discusses the planning and implementation of a laboratory course in which students carried out experimental measurements, reduced data, conducted literature surveys, and presented their results in the form of original research papers. (Author/MLH)

In a Millikan oil drop experiment, there is a best measuring time for observing the drop, due to Brownian motion of the drop and the experimenter's reaction time. Derives an equation for the relative error in the measurement of the drop's excess charge, and obtains a formula for the best measuring time. (Author/MLH)

Reports on work at the University of Erlangen beginners' seminar on language laboratory work. This led to production of original laboratory exercises, which were tried out in a Gymnasium class. The aim was to introduce teacher candidates early to problems attending the introduction of language laboratories. (Text is in German.) (IFS/WGA)

Because students can express orally what they find difficult to communicate on paper, Davis worked out a system employing the language lab as a way of directing verbal communication to written for his writing course. Tape recorders aided students in compositon, organization, revision, and proofreading. (SC)

The University of Geneva's language laboratory is used by various departments but chiefly by the Ecole de Langue et de Civilisation francaises. This is a description of types of exercises used by the respective departments, as well as plans for a library-study laboratory. (AM)

Describes the experimental procedure and expected outcome in the growth of rice seedlings with light conditions and water aeration as variables. (GS)