From Preface: "The present bulletin is printed as a supplement to Bulletin 17 and is intended primarily for coal miners, especially for those working in fields where inflammable gas or coal dust may cause disastrous mine explosions. The bulletin is issued by the Bureau of Mines in the hope that it may prove helpful in lessening accidents due to the use of explosives, and in particular may aid in preventing mine explosions, many of which have been caused by the use of improper explosives."

Maps that illustrate sections of the anthracite coal mines beneath the city of Scranton, Pennsylvania to accompany a bulletin issued by the U.S. Bureau of Mines.

From Introduction: "In connection with the fuel investigations conducted by the Bureau of Mines much information has been accumulated as to the smoke abatement activities in various cities. The essential features of the information are presented in this report, which, it is believed, will be of public interest and benefit, especially to those communities that are just beginning organized effort to abate unnecessary smoke."

From Results of Briquetting Tests: "The results of the briquetting investigations conducted by the Government are expected to prove of considerable value, not only to the Government itself as the owner of extensive lignite deposits and largest single purchaser of fuel, but also to the people living in the the regions where lignite is found. The problem assumes still larger proportions when one realizes that the development of manufacturing industries in those regions depends upon the ability to obtain a cheap and satisfactory fuel. Although the results presented in this bulletin are not conclusive, they warrant the continuation of the investigators as soon as funds can be available for the purpose."

From Introduction Scope of Report: "This bulletin is a report on an investigation of the volatile matter in several typical coals-its composition and amount at different temperatures of volatilization. As the investigation is still in progress and will doubtless include other coals than those already examined, the bulletin may be considered a preliminary report, stating the problems studied, the methods used, and the results thus far obtained."

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.

Map that illustrates sections of the anthracite coal mines beneath the city of Scranton, Pennsylvania to accompany a bulletin issued by the U.S. Bureau of Mines.

Map that illustrates sections of the anthracite coal mines beneath the city of Scranton, Pennsylvania to accompany a bulletin issued by the U.S. Bureau of Mines.

Map that illustrates sections of the anthracite coal mines beneath the city of Scranton, Pennsylvania to accompany a bulletin issued by the U.S. Bureau of Mines.

Map that illustrates sections of the anthracite coal mines beneath the city of Scranton, Pennsylvania to accompany a bulletin issued by the U.S. Bureau of Mines.

Map that illustrates sections of the anthracite coal mines beneath the city of Scranton, Pennsylvania to accompany a bulletin issued by the U.S. Bureau of Mines.

Map that illustrates sections of the anthracite coal mines beneath the city of Scranton, Pennsylvania to accompany a bulletin issued by the U.S. Bureau of Mines.

Map that illustrates sections of the anthracite coal mines beneath the city of Scranton, Pennsylvania to accompany a bulletin issued by the U.S. Bureau of Mines.

Map that illustrates sections of the anthracite coal mines beneath the city of Scranton, Pennsylvania to accompany a bulletin issued by the U.S. Bureau of Mines.

Map that illustrates sections of the anthracite coal mines beneath the city of Scranton, Pennsylvania to accompany a bulletin issued by the U.S. Bureau of Mines.

Map that illustrates sections of the anthracite coal mines beneath the city of Scranton, Pennsylvania to accompany a bulletin issued by the U.S. Bureau of Mines.

Map that illustrates sections of the anthracite coal mines beneath the city of Scranton, Pennsylvania to accompany a bulletin issued by the U.S. Bureau of Mines.

Map that illustrates sections of the anthracite coal mines beneath the city of Scranton, Pennsylvania to accompany a bulletin issued by the U.S. Bureau of Mines.

Map that illustrates sections of the anthracite coal mines beneath the city of Scranton, Pennsylvania to accompany a bulletin issued by the U.S. Bureau of Mines.

Map that illustrates sections of the anthracite coal mines beneath the city of Scranton, Pennsylvania to accompany a bulletin issued by the U.S. Bureau of Mines.

Map that illustrates sections of the anthracite coal mines beneath the city of Scranton, Pennsylvania to accompany a bulletin issued by the U.S. Bureau of Mines.

Map that illustrates sections of the anthracite coal mines beneath the city of Scranton, Pennsylvania to accompany a bulletin issued by the U.S. Bureau of Mines.

Map that illustrates sections of the anthracite coal mines beneath the city of Scranton, Pennsylvania to accompany a bulletin issued by the U.S. Bureau of Mines.

Map that illustrates sections of the anthracite coal mines beneath the city of Scranton, Pennsylvania to accompany a bulletin issued by the U.S. Bureau of Mines.