Report issued by the Bureau of Mines over mineral characteristics, uses, and problems. Descriptions of common minerals and their uses are presented and discussed. This report includes tables, maps, illustrations, and photographs.

Report issued by the Bureau of Mines over studies conducted on low-temperature carbonization of coal. Methods and results of the studies are presented and discussed. This report includes tables, illustrations, and photographs.

Report issued by the Bureau of Mines over mineral characteristics, uses, and problems. Descriptions of common minerals and their uses are presented and discussed. This report includes tables, maps, and illustrations.

Report issued by the Bureau of Mines over studies conducted on thin coal beds of the anthracite region in Pennsylvania. Results of the studies are presented and discussed. This report includes tables, maps, illustrations, and photographs.

Report issued by the Bureau of Mines over experiments conducted on coal-dust explosions. The results of the experiments are presented and discussed. This report includes tables, illustrations, and photographs.

From Author's Explanation: "This bulletin is intended to include every legislative enactment of the Commonwealth of Pennsylvania relating to the mining and mineral industries. The entire body of mining laws is set out for these obvious reasons: (1) To show the progress and advancement made, and the changes through which the enactments have passed; (2) an author may not assume the determination of what particular laws are in fact in effect, as this is within the jurisdiction of the courts alone; (3) it was at least necessary to set out all acts that had at any time been construed by the courts."

From Introduction: "The investigations presented in this bulletin have been undertaken by the bureau with a view to a better understanding of the conditions which confront the producer of commercial feldspar and also with the object of determining wherein the various deposits of feldspar differ."

From Preface: "This bulletin deals with the cracking of petroleum and other hydrocarbons and the production thereby of gasoline, benzene, and toluene."

Report issued by the Bureau of Mines over analyses of coal samples collected from 1911 to 1913. The analyses and descriptions of the samples are presented and discussed. This report includes tables, and illustrations.

Report issued by the Bureau of Mines over studies conducted on hydraulic mine filling. The different uses of this type of mine filling are discussed. This report includes tables, and illustrations.

From Preface: "In carrying out such a policy with reference to the subject under consideration, the Bureau of Mines invited the State geologists, mine inspectors, and a number of coal operators and oil and gas well drillers from the States interested to meet representatives of the Bureau of Mines in Pittsburgh, Pa., for a discussion of the subject during February 7 and February 8, 1913. This adjourned meeting of the conference will be held at an early date and its report will be printed in a later edition of this bulletin, with such additional suggestions as may be received by the Bureau of Mines. The bureau will be glad, therefore, to receive at the earliest practicable date any additional suggestions or any additional information throwing light on the matters discussed in this bulletin."

Bulletin issued by the U.S. Bureau of Mines regarding the conditions of the mines beneath the city of Scranton, Pennsylvania, including suggestions about methods to continue excavating coal while preserving the structural integrity of the city's foundation.

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.