Illustrations that accompany a report issued by the U.S. Bureau of Mines regarding a buried valley area (a deposit of clay, sand, and gravel) around the Susquehanna River in the anthracite region of Pennsylvania, near the city of Wilkes-Barre. Most of the images are cross sections of the area.

From Introduction: This review contains abstracts of the technical literature and patents dealing material application of the Bergius and related processes for the hydrogenation, under greater than atmospheric pressures, of liquid and solid carbonaceous materials such as coal, lignite, their distillation and extraction products, pitches and tars, and petroleum and its distillation residues."

From Introduction and Summary: "However, with the completion and satisfactory performance of an experimental vertical slot oven of 500-pound capacity at the University of Illinois Geological Survey Laboratory, the opportunity to directly compare BM-AGA coke with coke made by two-sided heating became available and the necessary test apparatus was installed. This report compares the results obtained by the two methods."

Report discussing experiments done on expandable waxes of lignites to determine yields and properties from certain place in the United States.

From Summary and Conclusions: "This report deals with upgrading to metal-lurgical standards of large reserves of high-sulfur Pittsburgh coal remaining in southwestern Pennsylvania and northern West Virginia."

From Scope of Report: "In this report one major unwatering project was developed. Three pools that inundate considerable tonnages of anthracite reserves are close enough together to be unwatered by some centralized system. Three alternative plans were studied to estimate the cost of each."

From Introduction: "The purpose of this investigation was to separate and identify as many of the principal phenolic compounds produced by the mild hydrogenation of Pittsburgh-bed (Bruceton) coal as possible and to determine with the greatest possible accuracy the proportions in which they are present."

From Preface: "The paper contains data on the development of the catalyst for the isosynthesis, on the effect of temperature and pressure of operation, and on the composition of the products of the reaction. In the last section, experimental evidence and speculations concerning the mechanisms of the isosynthesis are discussed."

From Reinstatement of Fifth Conference: "The program of the Fifth Conference is reproduced below. Of the time allotted for each paper, about half was used for presentation and half for discussion. Out of this developed the program that is the subject of this publication."

From Introduction and Summary: "This paper gives results of an investigation of the composition and carbonizing properties of coals from Pocahontas No.3 bed, Lake superior No.4 mine, McDowell County, W.Va.; Eagle bed, Cannelton No.3 mine, Fayette County, W.Va; and No.2 Gas bed, Cannelton No.100 mine, Kanawha County, W. Va."

Report issued by the U.S. Bureau of Mines regarding a buried valley area (a deposit of clay, sand, and gravel) around the Susquehanna River in the anthracite region of Pennsylvania, near the city of Wilkes-Barre. According the the introduction, "The purpose of this report is to furnish data on the buried valley of the Susquehanna River that will be useful in solving the anthracite mine-water problem" and "This report (a) discusses the physical characteristics and the influence of the buried valley of the Susquehanna River on anthracite mining in the Wyoming Valley area of the Northern field, (b) correlates pertinent data relating to the buried valley, (c) presents accurate contour maps showing the position of the top of solid rock underlying the water-soaked valley-fill deposits in the buried valley, and (d) presents cross sections at regular intervals across the buried valley showing the irregularities in trend and bottom as well as the thickness, configuration, and nature of the materials composing the water-bearing valley-fill deposits" (p. 3).

From Forward: "The value of this survey of the carbonizing properties of American coals by a standard method lies in the comparability of the results on different coals. It must recognized that no standard laboratory method of carbonization, even on a large unit, can yield results that exactly duplicate those obtained in ovens and retorts. The commercial results vary with the type of oven or retort. Allowance must be made for such differences in interpreting the BM-AGA test results in terms of commercial plants."

From Introduction: "The first major assignment was the sampling and testing of a series of typical American coals deemed to be suitable for hydrogenation based on early research work conducted by the Bureau of Mines. The first series of tests has been completed and is reported in this paper."

From Introduction: "The present bulletin also contains all the pertinent explanatory matter that appeared in its predecessors. Thus, it retains the same dual purpose of assembling the available values of the entropies at 298.16 degrees K of the elements and inorganic compounds and giving enough explanation of methods of calculating entropies to make the results comprehensible."

From Introduction: "Problems connected with incidence, effects, determination, and control of dusts are still much before the public, although more information is available to the layman than when Bulletin 400, of which this publication is a revision, was issued in 1937. This revision includes data that have accumulated since 1937 and some that appeared previous thereto but were not available to the authors at that time."

From Introduction: "The primary objective of this paper is to discuss the hazards and furnish a list of recommendations for the safe operation of the quarries and related works. The second objective is to describe and illustrate safety devices, practices, and quarrying methods."

Report discussing mines accidents in the United States, their causes, and the progress that has been made over a period of many years to improve safety practices in the mining industry. Although mining accidents occur in the United States with greater frequency than in several European nations, the positive effects of new mining methods, mechanization, and others advances in mining are reflected in the statistics.

Report issued by the U.S. Bureau of Mines on the development and production of synthetic liquid fuels derived from agricultural products. The amount of synthetic fuels developed from corn is presented. The report includes tables, maps, and illustrations.

Report issued by the U.S. Bureau of Mines on the Shawangunk mine near Sullivan County, New York. This study investigated the zinc-lead deposits found at the site. The report includes tables, maps, photographs, and illustrations.

Report issued by the U.S. Bureau of Mines regarding the operation of the Coal Hydrogenation Demonstration Plant in Missouri. This report summarizes the operating experience gained and the characteristics of the products created during operation of the plant. The report includes graphs, tables, and illustrations.

Report issued by the U.S. Bureau of Mines on the motor fuel sold in the U. S. during the winter of 1949-1950. Properties and trend characteristics of the fuel sold are presented. This report includes tables, graphs, and a map.

Report issued by the U.S. Bureau of Mines on the drilling for copper deposits near Pinal County, Arizona in 1949. Topographic and geologic mapping, drilling, and field tests were studied. Tables, maps, and illustrations are presented.

Report issued by the U.S. Bureau of Mines on the development of a mobile compressor and utility station in the oil-shale mine near Rifle, Colorado during 1949. The report includes photographs and illustrations of the mobile station.

Report issued by the U.S. Bureau of Mines on the importance and instructions for preparing thin sections of rock for microscopic examination. Proper instructions and methods for preparation of thin sections are presented. The report includes photographs.