The often observed and misunderstood phenomenon of movement of black and white vanes in toy radiometers under illumination is discussed in a generalized non-mathematical manner. Effects of light pressure, low gas density, friction, heat, and motion are illustrated. (JM)

Discusses an experiment for the measurement of the half-life of cosmic ray muons by using a single scintillator detector. (LS)

The passive solar and heat retention features of a dormitory at Colby College (Maine) are credited with a 60 to 70 percent reduction in heating costs. (Author/MLF)

Discusses theorectical and methodological challenges presented to the social science community by large-scale radioactive waste management. Overviews analysis, management, and decision making. (MK)

The new fine arts complex at Memphis State University (Tennessee) has extensive south-facing windows and massive Trombe walls, composed of concrete blocks that absorb heat and release it slowly, that together provide about 20 percent of the building's heat. Part of the masonry was also designed to absorb sound. (Author/MLF)

Two schools in New York's snow belt region are using solar energy to heat their swimming pools. (Author)

A checklist covers potential energy saving modifications in a building scheduled for renovation, and includes suggestions for room utilization, landscaping, and building envelope, solar control, and active system modifications. (Author)

With the introduction of an appropriate mechanism for financing conservation and renewable energy, with a broad based educational effort, and with strong support from public officials, it should be possible to launch a national energy program that would have great employment benefits, primarily in urban areas. (Author/GC)