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This paper presents the determination of the greatest stiffness and least power consumption of capillary compensated hydrostatic slideways, prestressed and non-prestressed, respectively. Design equations for determining the optimum values of supply pressure, pocket pressure, length of free-periphery of slideways rim, thickness of land of slideways rim, viscosity, capillary-discharge coefficient and power consumption are determined, other variables held constant. The paper determines the operative conditions which correspond strictly or approximately to the conditions assumed in the equations. Diagrams show the effect of discrepancy between optimum and actual conditions on the stiffness of slideways. [ABSTRACT FROM AUTHOR]

The article presents an examination of transportation energy use and conservation. The reasons considered for examining transportation energy consumption are presented, which include the fact that transportation of people and good consumes one-fourth of the total U.S. energy budget. Other reasons are the facts that world oil reserves are limited, U.S. transportation is dependent on oil as a fuel, use of petroleum present environmental problems, and that transportation contributes to urban congestion, inefficient land use and noise.

The article offers a report in connection with the future uses of solar energy. The section includes, reports on the amount and distribution of solar energy in the United States, the principles of solar energy conversion, and the future outlook of solar energy. Reports states that solar energy has been evaluated in terms of fuel values, technical uses, and human needs by various researchers in field of science. It reports that solar energy received by the land area of the United States is 2,000 times greater than the total fuel consumption in the country, without comparing the efficiency of conversion of either energy form.

Trends in the U.K. consumption of coal, oil, natural gas, nuclear and hydroelectric energy are discussed, and forecasts of use to the year 2000 A.D. are given. More detailed forecasts of fuel use by different sectors to 1985 are presented. Wastes, the resulting pollution and their likely future trends from the following energy sources are reviewed: primary energy--oil treatment, natural gas transhipment, coal production and nuclear and hydroelectric power; secondary energy--electricity generation, coking and gas making; tertiary energy--use of fuels in transport and the domestic sector. Emission forecasts for several air pollutants from all energy sources to 1985 are presented, the pollution and damage arising being discussed. The need for further waste and pollutant monitoring is then debated, and the necessity of continuing to consider environmental protection in energy policy decisions, along with fuel conservation and relative price is stressed. [ABSTRACT FROM AUTHOR]