Study of the geology and ore deposits of the Breckenridge District in Colorado.

Report of the United States Army regarding events during the Brownsville (Tex.) Affair including documentation and transcripts of the court proceedings of the court of inquiry appointed to hear and report upon all charges and testimony relating to the shooting affray which took place at Brownsville, Texas.

Report of the United States Army regarding events during the Brownsville (Tex.) Affair including documentation and transcripts of the court proceedings of the court of inquiry appointed to hear and report upon all charges and testimony relating to the shooting affray which took place at Brownsville, Texas.

Report of the United States Army regarding events during the Brownsville (Tex.) Affair including documentation and transcripts of the court proceedings of the court of inquiry appointed to hear and report upon all charges and testimony relating to the shooting affray which took place at Brownsville, Texas.

Report of the United States Army regarding events during the Brownsville (Tex.) Affair including documentation and transcripts of the court proceedings of the court of inquiry appointed to hear and report upon all charges and testimony relating to the shooting affray which took place at Brownsville, Texas.

Report of the United States Army regarding events during the Brownsville (Tex.) Affair including documentation and transcripts of the court proceedings of the court of inquiry appointed to hear and report upon all charges and testimony relating to the shooting affray which took place at Brownsville, Texas.

Report of the United States Army regarding events during the Brownsville (Tex.) Affair including documentation and transcripts of the court proceedings of the court of inquiry appointed to hear and report upon all charges and testimony relating to the shooting affray which took place at Brownsville, Texas.

Report of the United States Army regarding events during the Brownsville (Tex.) Affair including documentation and transcripts of the court proceedings of the court of inquiry appointed to hear and report upon all charges and testimony relating to the shooting affray which took place at Brownsville, Texas.

Report of the United States Army regarding events during the Brownsville (Tex.) Affair including documentation and transcripts of the court proceedings of the court of inquiry appointed to hear and report upon all charges and testimony relating to the shooting affray which took place at Brownsville, Texas.

Report of the United States Army regarding events during the Brownsville (Tex.) Affair including documentation and transcripts of the court proceedings of the court of inquiry appointed to hear and report upon all charges and testimony relating to the shooting affray which took place at Brownsville, Texas.

Report of the United States Army regarding events during the Brownsville (Tex.) Affair including documentation and transcripts of the court proceedings of the court of inquiry appointed to hear and report upon all charges and testimony relating to the shooting affray which took place at Brownsville, Texas.

Report of the United States Army regarding events during the Brownsville (Tex.) Affair including documentation and transcripts of the court proceedings of the court of inquiry appointed to hear and report upon all charges and testimony relating to the shooting affray which took place at Brownsville, Texas.

Report of the United States Army regarding events during the Brownsville (Tex.) Affair including documentation and transcripts of the court proceedings of the court of inquiry appointed to hear and report upon all charges and testimony relating to the shooting affray which took place at Brownsville, Texas.

Report issued by the Bureau of Mines discussing coal mining gas and dust explosions, specifically those at the Monongah, Darr, and Naomi mines of Pennsylvania and West Virginia. Studies on mine explosions, as well as methods and analyses are presented. This report includes tables, and an illustration.

The following report examines the mineral resources and geologic relations of the pre-Cambrian rocks and the associated iron ores in the Llano-Burnet region, Texas.

From Introduction Scope and Purpose of Inquiry: "The Bureau of Mines, to which the testing and analyzing of fuels as carried on by the United States Geographical Survey has been transferred, is continuing producer-gas investigations at the testing station at Pittsburgh, Pa. Results of the gas-producer tests made at the coal-testing plant erected at St.Louis, Mo., and of a study of some of the problems that came up in the tests have been published by Geological Survey. Results of the tests made at Norfolk, Va., and Pittsburgh, Pa. and of further studies of particular problems, will be published by the Bureau of Mines."

From Introduction: "This bulletin contains a statement of certain results that will be embodied in a report describing investigations of the combustion of fuel made by the United States Geological Survey and the Bureau of Mines in a specially constructed long furnace."

From Introduction: "It is the purpose of this paper to describe some apparatus and methods which have proved satisfactory to those engaged in the chemical work of the investigations mentioned. While these methods and apparatus have been designed more particularly with regard to analysis of furnace gases, their use is by no means limited to that purpose."

From Scope of Report: "The purpose of this report is, therefore, to present in convenient form all the more important data accumulated in the course of the tests described, in order that the results may be readily accessible both to the Government officials having charge of the design, purchase, or care of power plants and to all persons interested in the development of the internal-combustion engine and the gas producer as means for utilizing the energy of fuels."

From Introduction: "The following report is a summary of the commercial results which were obtained from 2,000 tests conducted by technologic branch of the United States Geological Survey at St. Louis, Mo., and Norfolk, Va., in 1907 and 1908, under the technical supervision of R.H. Fernald, engineer in charge of the producer-gas section."

From Introduction: "With the particular equipment used in the tests both coal and briquets were far from smokeless; consequently the data of this bulletin are applicable only by analogy to parallel operation with a coal more nearly smokeless, but nevertheless applicable with much reliability. It was the original intention to make a set of preliminary steaming tests alongside a dock (which tests furnish material for this bulletin) an to finish with a set of running tests at sea; but the running tests were never made. for lack of time and men."

From Object of Tests: "The primary object of the tests was to study the relative performances of the two types of briquets and of the coal, with reference to efficiency, tendency to smoke, and the ease with which steam could be kept up, when each of the three varieties of fuel was burned at several rates of combustion. Many secondary objects were in mind, the data concerning which are discussed under "Effect of varying rates of combustion," pages 20-27."

Report that investigates the possibility of conserving coal despite its extensive use in railroad locomotives across the United States. Includes an experiment using different grades of coal in an approximation of a locomotive, as well as data regarding fuel utilization and loss.

Report discussing coal problems existing in Alaska, which Alaskan coal has high value.