Descriptions of equipment and procedures are provided for: (1) a detection system for mass-spring oscillations; (2) an economical holography table; (3) demonstration alternating-current circuit board; and (4) demonstration of damped oscillation using a set of magnets. (SK)

The basic dynamics of high speeds in one frame of reference is proposed as an approach to relativity. Students could use the methods of generalizing used with Snells law and thermal expansions. (DS)

Future use of nuclear energy to produce electricity and desalted water is outlined. Possible desalting processes are analyzed to show economic feasibility and the place in planning in world's economic growth. (DS)

Impressions of an institute and a six-week educational visit to India are presented. Organizations of schools, teaching methods, availability of supplies, background of students, and teacher characteristics are related. (DS)

Survey of the characteristics of Illinois physics teachers in terms of age, teaching experience, preparation in the sciences and classes taught. Changes in physics enrollment from 1967 to 1970, and problems hindering effective physics teaching are presented. (DS)

Surveys the responses given to a physics problem regarding calculations of the temperature difference between the internal and external surfaces of a pan with boiling water. Presents a numerical answer to the problem. (DS)