Report consisting of an expository account of the theory of modular forms and its application to number theory and analysis.

Report issued by the Office of Saline Water over the development of the secondary refrigerant freeze desalination process. The process is presented and discussed. This report includes tables, illustrations, and photographs.

A bibliography on impact structures by that supplements the U.S. Geological Survey Bulletin 1220 by citing literature published or reviewed since 1964.

From foreword: This report evaluates one family of reactors in the reactor development program of the AEC, an provides a basis for their consideration in the assessment of the overall program.

From foreword: This report evaluates two types of reactors and provides a basis for their consideration in the assessment of the overall program of the AEC.

From introduction: The purpose of this study was to compile information on and systematically assess uranium and other radioactive occurrences in the region.

From introduction: The U.S. Geological Survey has selected and assembled 67 sets of aerial photographs that illustrate a variety of geologic features in Antarctica, South and Central America, the southwest Pacific, Iran, Japan, the Arabian Peninsula, Pakistan, and mainland China. Contact prints of the photographs composing these sets are available for purchase. Sets of photographs of geologic features in the United States and Puerto Rico are listed in a separate catalog (Denny, C. S., and others, 1968, A descriptive catalog of selected aerial photographs of geologic features in the United States: U.S. Geol. Survey Prof. Paper 590).

This is a report on the stratigraphy of the Star Peak Group an overlying lower Mesozoic rocks Humboldt Range in Nevada.

From foreword: This report is an overall assessment of the technical status and economic potential of advanced converters and breeders, the role of thorium, various reactor fuel cycles, and a systems analysis of the future nuclear-electric power complex.

The following progress report describes the examination of elements removed in comparison to a previous study on the power facility reactor operations.

The following report describes the design and intended function of the tolerance comparator device, a tool designed to aid those engaged in the manufacture and inspection of parts as defined by drawings using positional tolerances.

Report discussing the results of a series of tests in Galveston Bay to: "(a) develop plans for relocation and stabilization of the jetty channel on an alignment and at a depth suitable fro the safe passage of supertankers; (b) determine means for protecting the north jetty from the undermining action of tidal currents; (c) determine the shoaling characteristics of the relocated and deepened jetty (inner bar) channel and develop plans for minimizing shoaling in the relocated channel; and (d) determine the best locations for additional anchorage areas adjacent to the jetty channel or in Bolivar Roads" (p. ix).

Report on investigations into the construction of a lock in the Arkansas River including results of model tests and recommendations.

Partial abstract: "The objective of the investigation reported herein was to obtain laboratory response data for deep, two-way-reinforced and plain concrete slabs subjected to static overpressures in order to determine the response analysis necessary to analyze the target vulnerability of such structures under both active and passive defense situations" (p. 4).

Summary: "This appendix presents the procedures for digital implementation of the segmented tire model, developed in the basic report for an analog computer. Two procedures are required: (a) determination of the segment spring coefficient from measured load-deflection test results, and (b) computation of the resultant force vector transmitted to the axle. Digital programs for both procedures were written in Fortran IV for a GE-420 system, and are included" (p. xi).

"This report summarizes the preliminary results of a current U. S. Army Engineer Waterways Experiment Station (WES) study of the feasibility of using bamboo as an expedient reinforcement for temporary, reinforced concrete structures. The report contains an extensive review of the literature, a description of the test procedures, results of an investigation of the most important engineering properties of bamboo, descriptions of tests of 26 bamboo-reinforced structural elements (20 simply supported beams with 6-ft (1.83-m) spans, and 6 simply supported two-way slabs of varying length, width, and depth), and conclusions and tentative recommendations for the design of bamboo-reinforced structures" (p. xiii).

Abstract: In the Blue Ridge Province of northern Virginia, Maryland, and southern Pennsylvania, Lower Cambrian beds are underlain by a thick sequence of greenstone and interbedded sedimentary rocks known as the Catoctin Formation. An area near Luray, Va., was studied to determine the thickness of the formation, its relationship to overlying and underlying rocks, and the original nature of the lavas from which the Catoctin greenstone was derived. There the Catoctin Formation lies unconformably on granitic rocks. Its basal sedimentary layer ranges from a few inches to 150 feet in thickness and contains pebbles of underlying basement rocks. The erosion surface beneath the Catoctin is irregular, and in several places, hills as much as 1,000 feet high were buried beneath the Catoctin lavas. No important time break is indicated between the deposition of the Catoctin Formation and the overlying Cambrian sediments. The original Catoctin lavas were basaltic and were probably normal plateau basalts. Columnar joints, amygdules, sedimentary dikes, flow breccias, low-dipping primary joints, and other primary structures are well preserved.

From introduction: The ruins of the pueblos and missions of Pecos lie on the east bank of Glorieta Creek near its junction with the Pecos River at the south end of the Sangre de Cristo Mountains in north-central New Mexico. Here the Pecos River and Glorieta Creek have formed a broad rolling valley in which the red adobe walls of the mission church stand as a striking monument to a historic past.

From abstract: Small deposits of native gold are present along an anastomosing system of quartz veins and shear zones just east of Great Falls, Montgomery County, Md. The deposits were discovered in 1861 and were worked sporadically until 1951, yielding more than 5,000 ounces of gold. The vein system and the principal veins within it strike a few degrees west of north, at an appreciable angle to foliation and fold axial planes in enclosing rocks of the Wissahickon Formation of late Precambrian (?) age. The veins cut granitic rocks of Devonian or pre-Devonian age and may be as young as Triassic. Further development of the deposits is unlikely under present economic conditions because of their generally low gold content and because much of the vein system lies on park property, but study of the Great Falls vein system may be useful in the search for similar deposits elsewhere in the Appalachian Piedmont.

From introduction: Much of the ground surface around Mount Rainier volcano is directly underlain by loose geologic deposits that veneer the hard rock formations. Examples of these deposits are sand and gravel bars along the rivers, ridges of loose rock debris beside the glaciers, and sloping aprons of rock fragments beneath almost every cliff. Even though they are generally thin and inconspicuous when compared with the rock formations, these surficial deposits are clues to geologic events that. have profoundly influenced the shape of the park's landscape. Thus, from the character and extent of glacial deposits one can judge the age and size of former glaciers that carved the cirques and deep canyons of the park; from the mudflows which streamed down nearly every valley one can infer the age and size of huge landslides of the past that helped determine Mount Rainier's present shape; and from the pumice deposits some of the volcano's recent eruptive activity can be reconstructed.

Report issued by the U.S. Bureau of Mines discussing supply and demand data from the energy industry. As stated in the introduction, "in this report, the discussions in the text describe the methods used to develop data deficiencies for inputs to the supply-demand tables" (p. 1). This report includes maps, tables, and illustrations.

Report issued by the U.S. Bureau of Mines discussing state and regional supply and demand data. As stated in the introduction, "the primary purpose of this study is to provide, on a state-by-state basis, petroleum and natural gas liquids industry data that can be (1) integrated into state and regional energy balances by source, form, and consumer sectors, and (2) used to determine interstate and inter-regional energy flows" (p. 1). This report includes maps, tables, and illustrations.

Report issued by the U.S. Bureau of Mines discussing regional and state supply and demand data. As stated in the introduction, "data for 1960 and 1965 have been presented in tabular form as supply-demand balances, showing the development of the total supply available for consumption and the disposition of that supply-demand by consuming sector for each state and region" (p. 2-3). This report includes maps, tables, and illustrations.

Report issued by the U.S. Bureau of Mines discussing regional supply and demand data between 1960 and 1965. As stated in the introduction, "in this report, the discussions in the text describe the methods used to develop data deficiencies for inputs to the supply-demand tables" (p. 1). This report includes maps, tables, and illustrations.