Describes an easily-implemented experiment in which a moderately complex relation between dependent and independent variables is involved. (Author/GS)

Presents an updated bibliography of literature pertaining to lecture demonstrations useful at all levels of instruction. (GS)

A manufacturer of physics apparatus answers questions about new equipment production, features included, reliability, cost, and teacher modifications. (GS)

Gives a brief survey of the different versions of the air trough and related devices. Presents some of the applications of this equipment in the teaching of the concepts of inertia, acceleration, and velocity. (GS)

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

Sets forth laboratory requirements for space, furniture, services, and special needs. Briefly reviews current laboratory conditions and practices and provides references for further research in this area. (GS)

Summarizes the results of a 1969 experiment survey made for learning the impact of special publications and the trend of experimentation in colleges. Describes some new or modified apparatus that has appared since the 1956 survey. (GS)

Presents ideas for equipment protection, equipment storage, apparatus construction, demonstration techniques, and laboratory procedures. (GS)

Briefly defines the legal aspects of safety. Presents prominent safety hazards and procedures that should be followed when dealing with electricity, radioactive materials, lasers, poisons, and vacuum apparatus. (GS)

Discusses the graphite to diamond transformation and a phase diagram for carbon. Describes high temperature-higher pressure experimental apparatus and growth of diamonds from seed crystals. Reviews properties of the diamond which suggest uses for the synthetic product. Illustrations with text. (GH)

Describes liquid surface holograms including their application to medicine. Discusses interference and diffraction phenomena using sound wave scanning techniques. Compares focussing by zone plate to holographic image development. (GH)

Explains macroscopic properties of a number of systems as averaged-out behavior of numbers of particles. The approach is applied to a model of nuclear fission, rotational velocity in a galaxy, the nature of the rings of Saturn, oscillations of the earth, drops on a spider web, and the shape of ruined Meidum pyramid. (GH)