Publisher's Synopsis
Excerpt from Coal-Mining Investigations Under Auspices of Carnegie Institute of Technology, United States Bureau of Mines, Advisory Board of Coal-Mine Operators and Engineers: The Yield and Quality of the Gas, Oil, and Other by-Products of the Constituents of the Freeport Coal Bed, Pennsylvania
There was an absence of secondary reactions, resulting in a thin, light tar, free from naphthalene. The gas yield was from 60 to 80 per cent of that from high-temperature processes. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
