Describes use of a Fresnel biprism to demonstrate double-slit interference with polarized light. Discusses polarization and phase properties of a randomly polarized gas. (JM)

Describes an experiment in which a microcomputer was programed to function as a transfer function analyzer to investigate the dynamics of stirred vessels. The main objective of the experiment is to illustrate the theory and application of the pulse test (a method of determining the transfer function of a process). (JN)

It is increasingly important for physicians to develop competence in ordering and interpreting laboratory tests. The goals, organization, instructional approaches, and assessment of a course offering systematic instruction in laboratory medicine are described. (Editor/LBH)

Describes how the continuous variation method may be used in senior chemistry classes at the secondary level. This technique allows for the detection of the one or more reactions that may occur in a system over a wide range of composition. (JR)

Discusses an experiment which introduces students to the effects of electrical forces on the motion of macroscopic objects. Included are the proecedures of measuring the charge-to-mass ratio from deflections of charged water drops in horizontal fields and the overall charges delivered in a Faraday cup. (CC)

Describes the construction and operational procedures of a simple setup which enables undergraduate students to conduct experiments on critical phenomena in gases. Indicates that the experimental features are proved comparable to those of the Reamer and Sage apparatus. (CC)

The author believes that one of the best ways of educating the student of contemporary and future technology is to use modern devices, instruments, and techniques in an up-to-date college laboratory. Experiments which motivate and which are of interest to the student, the professor, and industry should be used extensively. (Author/TS)