Report on the production, technology, and uses of petroleum and its products . actically ended. M. A. Eivierehas published a paper on the origin of combustible minerals, (b) His opinions are based on hisobservations of the effect on soil and organic matter in the soil of the leakage of illuminating gas from the pipesin which it is conducted. The effects which he attributes to marsh-gas are, however, due to the condensation of thetarry matter that is dissolved in the escaping gas, the coal-tar products produced at a high temperature not beingconstituents of petroleum to any great extent. The ex
Report on the production, technology, and uses of petroleum and its products . actically ended. M. A. Eivierehas published a paper on the origin of combustible minerals, (b) His opinions are based on hisobservations of the effect on soil and organic matter in the soil of the leakage of illuminating gas from the pipesin which it is conducted. The effects which he attributes to marsh-gas are, however, due to the condensation of thetarry matter that is dissolved in the escaping gas, the coal-tar products produced at a high temperature not beingconstituents of petroleum to any great extent. The experiments of Professor Sadtler indicate the presence ofminute quantities of benzole in the Bradford oil of Pennsylvania, (c) but it was not found by Warren and Storer inthe Oil creek oils, its presence in the Bradford oil furnishing an additional reason for supposing it to be a fractionaldistillate produced uuder great pressure, and consequently at a comparatively high temperature. a S. P. Peckharr, P. A. P. S., x, 453. b C. R., xlvii, 646. c Communication to S. F. DRAWING OF A PORTION OF THE SURFACE OF A HORSE OF SANDSTONE FOUND ENCLOSED IN THE GRAHAMITE VEINRITCHIE CO. * SHOWING THE MANNER IN WHICH THE GRAHAMITE CLEAVES FROM THE ENCLOSING ROCK. THE NATURAL HISTORY OF PETROLEUM. 75 Chapter VL—THE DEVELOPMENT OF OIL TERRITORY. In 1858 and 1859, just before Drake obtained oil in his well, the region now known as tbe oil region was analmost unbroken forest. Here and there along the valleys of the Allegheny and its tributaries the bottom-landshad been broken into farms, but on the hills, excepting in the neighborhood of the larger towns, there were but fewcultivated tracts. The landscape along these winding streams was very beautiful. The towns were but little morethan lumbering camps and trading stations, with few churches or school-houses, and the stores were for the mostpart kept by those engaged in the lumbering business, who employed nearly the entire populatio
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