It maintains that there is a strong need for clearing the confusion around several theories of gravitation. A comprehensive theoretical framework is suggested against which every theory should be tested. The hope is that only one theory of gravitation will emerge from rigorous examination and provide a strong base for future research. (PS)

Outlines the prospects of generating coherent x rays using high-power lasers and indentifies problem areas in their development. Indicates possible applications for coherent x rays in the fields of chemistry, biology, and crystallography. (GS)

Reports on experiments conducted on two biological clocks, in organisms in the plant and animal kingdoms, which indicate that biological oscillation can be arrested by a single stimulus of a definite strength delivered at the proper time. (GS)

Discusses new problems arising from the growing observational data through radio telescope arrays, involving the origin of radio sources, apparent superluminal velocities, conversion of radio sources to relativistic particles, and the nature of compact opaque and extended transparent sources. New physics may be needed to answer these cosmological…

Describes the basic design and principle of operating an optical-infrared telescope, the MMT. This third largest telescope in the world represents a new stage in telescope design; it uses a cluster of six reflecting telescopes, and relies on an automatic sensing and control system. (GA)

Discusses research that indicates that nerve membranes, which play a key role in the conduction of impulses, are traversed by protein channels with ion pathways opened and closed by the membrane electric field. (Author/MLH)

Discusses expanding user community seeking access to synchrotron radiation sources, properties/sources of synchrotron radiation, permanent-magnet technology and its impact on synchrotron radiation research, factors limiting power, the density of synchrotron radiation, and research results illustrating benefit of higher flux and brightness. Also…

Divides the components of the energy crisis into those which demand immediate, moderate term, and long term research efforts. Delineates specific topics in each category and solicits physicists' efforts in these areas. (CP)

Reviews recent developments in the study of an ultrafast process which utilizes short flashes of light. (SL)

Reviews recent developments in the field of laser fusion. (SL)

This historical survey describes the contributions made to the field of physics by the National Bureau of Standards since its inception in 1901. Four broad areas are emphasized: nuclear physics, thermal physics (including cryogenics), spectroscopy and fundamental constants. (BT)

Explains briefly some of the properties of clouds on the basis of modern research. The use of an instrumented sailplane has been quite successful in both the qualitative and quantitative study of clouds. (PS)