Some results of the skylab missions and ways in which man has optimized the scientific return are discussed. (Author/RH)

An account of Van't Hoff's change from theoretical chemistry to petrology provides data on the European intellectual climate of the early 1900's and shows how his work laid the foundation for experimental petrology of hard rocks." (AL)

This is the first scientific report on the examination of the lunar samples returned from the Apollo 12 mission. Analyses of 34 kilograms of lunar rocks and fines reveal significant differences from the samples from Tranquillity Base, most notably in age, texture, amount of solar wind material, and in mineral and chemical composition. (LC)

Describes Project Tektite 1, during which a team of four scientists spent 60 days approximately 15 meters beneath the surface of the sea. Describes the "habitat" in which the men lived, reports biological and geological research carried out, and concludes that this research method has many advantages and potentialities. (EB)

Discusses environmental pollution problems caused by direct discharge of submarine seeps of marine oil. (PEB)

Reviews seismological studies that provide evidence of the existence of continental roots beneath the continents. Suggests, that through the collisions of plate tectonics, continents stabilized part of the mobile mantle rock beneath them to form deep roots. (ML)

Investigates Mercury concentration in ocean water in the Gulf Stream. A correlation was found between variations in mercury and silicate, suggesting a common link in their marine geochemistry. (HM)

The controversy surrounding the potential storage of nuclear waste at Yucca Mountain, Nevada, is discussed. Arguments about the stability of the site and the groundwater situation are summarized. The role of the U.S. Department of Energy and other political considerations are described. (CW)

Discusses relationships between the developed countries and the less developed countries. Emphasis is on the growing realization of the role of science and technology as determinants of standards of living. Widespread competence in geology is a positive factor. (Author/EB)

Describes the background of schemes to rationalize earth science departments in the United Kingdom. Discusses the rationale of these schemes and the controversy they have caused in the academic community. (CW)

Discusses the children of Aldo Leopold, their contributions to science and environmental conservation, and the influence of their father's ideas on their lives. (SA)