Report issued by the Bureau of Mines over western lignite. The economic use of these lignite deposits is discussed. This report includes tables, illustrations, and photographs.

Describes habits, predators, morphology, sexual variation, pelages, and distribution of pocket gophers. Describes genera and group relations. Describes, lists locations and distribution, and provides a key for species and subspecies.

Technical paper issued by the Bureau of Mines over the construction of cracking furnaces for gasoline production. Descriptions of the equipment used for construction are presented and discussed. This paper includes photographs.

From introduction: This report determines the geographic distribution and thickness of the bituminous shale, or oil shale, or tar shale of the Green River formation of the Uinta Basin in Colorado and Utah.

From introduction: The object of this bulletin is twofold-to locate definitely and to describe accurately the marbles and dolomites of eastern Vermont, with a view to setting forth their possible economic uses and to discuss whatever features of scientific interest they may present.

From Introduction: "This report presents the results of an investigation begun by the Government in the summer of 1907, the investigation being started under the immediate supervision of Dr. J. A Holmes and continued under him as director after it was transferred to the Bureau of Mines in 1910, the field studies being completed in the spring of 1912. The purpose of the investigation was to obtain information on the origin of the inflammable gases in coal and the conditions under which they occur."

Technical paper issued by the Bureau of Mines over studies of low-grade fuel use in Europe. The results of the studies are presented and discussed. This paper includes tables, and illustrations.

From Introduction: "This bulletin is published by the bureau primarily for persons who seek information on the subject of metal-lurgical smoke but are unacquainted with the technical language of metallurgy. The effort is made in this paper to present the problem of metallurgical smoke as it actually exists, without bias of any kind."

Report presents an equation that connects all the major qualities of a fabric, from which the fabric may be rigidly designed with respect to maximum ultimate economy.

Report issued by the Bureau of Standards over studies on the specific heat of copper. The methods and equipment used for the studies are discussed. This report includes tables, photographs, and illustrations.

From preface: This report satisfies the demand of the public for reliable information and to gather data which should be of use in planning further geologic work in Nevada.

From Preface: "This bulletin presents the report of the commission and the papers, prepared by the various experts, which give the results of investigations undertaken by the commission and form the basis of its findings."

From Introduction: "The investigation described in this bulletin was undertaken by the Bureau of Mines in an endeavor to obtain exact information on some of the basal questions involved in the use of gasoline locomotives in mines, this investigation being one of many that the bureau has been conducting in its efforts to increase safety and efficiency in mining."

Discusses history, nomenclature, common names, habits, external characters, and specimens of American marmots. Describes, lists locations, and provides a key to species and subspecies.

Part 1 presents the results of a wind tunnel test of a biplane model with an 18 inch span. The lift, drift, and pitching moment were measured for a series of angles of incidence corresponding to the maximum possible changes of flight attitude. Only the discussion of symmetrical or longitudinal changes is given. From the observed rate of variation of the forces and pitching moment, it was possible to calculate the derivatives needed in the complete theory of longitudinal stability in still air.

Report discussing a committee being formed and rules along with regulations for metal mines.

Discusses habits; economic status; characteristics and development of young; pelages and molts; and geographic, individual, sexual, and age variation. Describes subfamilies, history, and generic names of the family Talpidae. Describes, lists locations, and provides a key for genera, species and subspecies.

Report issued by the Bureau of Standards over studies on basic acetates and their importance as an effective clarifying agent. The analytical procedures and the results of the studies are discussed. This report includes tables, and illustrations.

From Introduction: "The material presented in this report is arranged in two parts. The first part contains the description of the apparatus and the methods used in sampling and analyzing flue gases. The second part gives experimental results obtained with the different methods of sampling and collecting of flue gas that are recommended in the first part of the report."

From Introduction: "The bulletin presents, first, a critical discussion of the possibility of smelting copper ores in the electric furnace; second, the results of the experimental work of other investigators on the electric smelting of copper; third, the results of experiments by the authors on the electric smelting of native copper concentrates and sulphide copper ores; and, fourth, a comparison of the electric furnace with the blast furnace and reverberatory furnace for copper smelting."

Report issued by the Bureau of Mines over issues encountered during construction of the Panama Canal. As stated in the introduction, "this report aims to discuss, from the viewpoint of the mining geologist, the bearing of topographic and geologic conditions on certain problems that arose in the construction of the Panama Canal" (p. 7). This report includes tables, maps, illustrations, and photographs.

A report to the Weather Bureau, Washington DC, from the chairman of the Subcommittee on the Atmosphere in Relation to Aeronautics describing the activities accomplished and the proposal of work to be undertaken by the subcommittee.

From introduction: "This bulletin aims to give the metal miner and the quarryman information similar to that given the coal miner in Bulletin 17. Inflammable gas or dust is seldom, if ever, found in quarries or metal mines, and the danger from using explosives there is less than in coal mines; but, as the figures show, the number of men killed and injured yearly in accidents caused by explosives proves the need of both miners and mine officials striving to see that none but proper explosives are used and these are used properly."

Report issued by the Bureau of Mines discussing extraction and recovery of different ores from carnotite. Equipment and methods for extraction are presented. This report includes tables, illustrations, and photographs.