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Evidence is presented that pore pressure has a measurable effect on rock strength and must be considered in any carefully conducted laboratory testing program for rock properties. It is not entirely clear, however, to what extent pore pressure affects test results for various rocks nor is it known how significant its effects might be in the design of structures founded in or upon rock. Thus the need for equipment to study pore pressure in rock is recognized. The report discusses the development of such equipment, its construction details, and operation. The pore pressure triaxial compression chamber is designed to accommodate 2 1/8-inch diameter specimens and operate at pressures up to 10,000 psi. Procedures relative to specimen preparation and saturation are described. Typical results are presented to demonstrate the reliability of the apparatus. The relationship among volumetric strain, pore pressure, and axial and diametric strain is discussed with regard to the mechanism of brittle fracture of rock. (Author).

A program of site location, site evaluation, and materials examination undertaken included a cultural resources reconnaissance of several unexamined terrace structures of the Table Rock Lake area to document the presence of site on these landforms and to gather information regarding the possibility of buried cultural deposits in these landforms. A total of 21 such terrace areas were examined. SIxteen of these contained prehistoric sites in which 14 were recommended for further investigations. The presence of buried surfaces and cultural deposits was also documented for this area and a thorough program of geomorphological study was recommended for the region. Ten sites were evaluated for possible nomination to the Natural Register of Historic Places. These included 3B0234, 3B0236, 3CR234, 3CR235, 3CR236, 23BY340, 23SN793, 23TA226, 23TA291, and 23TA309. Sites 3CR234, 3CR236, 23TA226, 23TA291, and 23TA309 were judged eligible for nomination to the National Register of Historic Places. A construction of the lithic reduction sequence used at 3 sites (23BY441, 23BY591, and 23BY605) was undertaken.

In all ages volcanoes have played a prominent role in human thought The Vulcan of classic mythology was but the head of a family of earth-gods born of the polytechnic Mediterranean mind fertilized by the "burning mountains" of continents conjoined in the Levant; and in the still lower stages of human development represented by scores of surviving tribes, Fire-Earth deities head the primitive pantheons—indeed, the Vulcanean notion seems to run back to a pristine stage in which the forerunners of living races first stole Vulcan's torch, tamed capricious and ferocious fire even as other [to them] beasts were tamed, and thus took the initial step in that nature-conquest by which man rose above lower life. Certain it is that Vulcanean myths are most dominant in lower savagery, feebler albeit sharper-cut about the birth-time of writing, and decadent during the period of written history.

A reprint of an introduction to the geographical structure of the Scottish landscape, featuring photographs and diagrams illustrating rock formation and mountain building.