Surveys new laser techniques and a variety of spectroscopic experiments that can be used to detect, measure and study very small numbers of atoms on molecules. The range of applicability of these techniques is also included. (HM)

Gives a perturbation analysis to recurrence effects of the spring pendulum. The recurrence depends on two conservation laws which determine the motion in an intermediate region; oscillations outside this region are unstable and must return. Gives the relation to Fermi-Pasta-Ulam problem together with the explicit solution. (Author/GA)

Describes an inexpensive double-beam laser photometry experiment to determine the molar heat of sublimation of I-2. The experiment employs common laboratory materials and components and gives results with a two percent to three percent accuracy. (Author/GA)

Gives an outline description of electronic circuitry which is analogous to the optical diffraction grating or to crystals used in the Bragg reflection of X-rays or electron waves, and explains how to use it. (Author/GA)

Describes three pieces of scientific apparatus and their demonstrational use: a high temperature apparatus for positron annihilation studies, a digitally synthesized classroom variable star, and a demonstration of plasma laser-beam focusing using paint stripper flames. (GA)

Discusses the adaptation of some familiar equipment for use in physics demonstrations: demonstrating waves using a folding slinky, measuring the partial pressure of water vapor, lengthening the time constant on a rate meter, measuring "g" with a phonograph turntable, and constructing a cheap signal generator. (GA)

Describes several developments in atomic clocks and frequency standards pointing out the feasibility and practicality in adopting a unified standard of time and frequency to replace other base standards of length, mass, and temperature. (GA)

Discusses some aspects of one-dimensional magnetism, the motivating factors that influenced the increase in the literature dealing with it, and the progress that has been achieved in this field. (GA)

Geophysical activity increased in 1978, especially seismic gas and oil exploration in the United States and its waters. (BB)

Provides eight physics experiments, demonstrations, and activities relating to radioactive decay, computers, semiconductors, and electronics. (SL)

Describes a computer simulation to elucidate the subject of coherence. The model on which simulation is based links coherence to the correlation of fields. It also describes the model and presents some results. (Author/GA)

Explains a university report proposing changes in the existing sixth-form curriculum to a common core, for all sixth-form syllabuses in physics, that will include: mechanics, waves, electricity and magnetism, and matter. Comments on the implications of the proposal are also stated. (GA)

Discussed are aspects of the use of mathematical models in the teaching of oscillation theory. (MDR)

A review of topics and undergraduate programs in physics with medical applications at Queen Elizabeth College, London, is given. (MDR)

Calculates energy expenditures for the activities of running and bicycling and discusses the heat dissipative perspiration system of the human body. (CP)