TREATISE ON PETROLEUM: COMPRISING ITS ORIGIN, GEOLOGY, GEOGRAPHICAL DISTRIBUTION, HISTORY, TOGETHER WITH A DESCRIPTION OF GAS WELLS, THE APPLICATION OF GAS AS FUEL, ETC. BY BENJAMIN J. CREW. WITH AN APPENDIX ON THE PRODUCT AND EXHAUSTION OF THE OIL REGIONS AND THE GEOLOGY OF BY CHARLES A. ASHBURNER, M.S., C.E., GEOLOGIST IN CHARGE, ILLUSTRATED BY SEVENTY ENGRAVINGS AND TWO PLATES. PHILADELPHIA: HENRY CAREY BAIRD & CO., LONDON: SAMPSON LOW, MARSTON, SEARLE & RIVINGTON, CROWN BUILDINGS, 188 FLEET STREET. レ HARVARD COLLEGE May 22, 1987 Fred Ur, Peper COPYRIGHT BY HENRY CAREY BAIRD & CO., 1887. COLLINS PRINTING HOUSE, PREFACE. THE Author of this treatise, Mr. Benjamin J. Crew, died on the fifth of November, 1885, just as he was on the point of completing his manuscript, leaving little else to be done except to supply the illustrations. This untoward event has caused a delay in the publication of the book, and rendered necessary the addition to it of the more recent history and statistics of both American and Russian petroleum and of natural gas, together with the newest applications of these products. In this important work, and in carrying the volume through the press, the publishers beg here to acknowledge their indebtedness to the brother of the author, Mr. J. Lewis Crew, who has been intimately connected with the petroleum industry since 1862, to Mr. Frank W. Edwards, Superintendent of the Chester Oil Co., Thurlow, Pa., to Mr. William T. Brannt, who has contributed considerable matter from the German, as well as to Dr. Wm. H. Wahl and to Mr. Charles A. Ashburner, the latter Geologist in Charge, Second Geological Survey of Pennsylvania, who has contributed an important paper on petroleum, as well as one on natural gas, both of which will be found in the Appendix. Had the author lived he would doubtless have taken pleasure in here specially acknowledging his indebtedness to the publications of the Second Geological Survey of Pennsylvania, and ticularly to the contributions to them of Mr. John F. Carll, who par |