The next great field is called the Lima-Indiana, and covers a considerable portion of northwestern Ohio and eastern Indiana. This petroleum contains less gasolene and less lamp oils, and more sulphur, which makes refining difficult. The Illinois field lies next. Here, in a strip about thirty miles long and six miles wide on an average, an enormous quantity of petroleum is produced. This oil is slightly lower in quality and contains considerable asphalt. The mid-continent field lies in Kansas and Oklahoma. This petroleum also contains asphalt and other chemical products. Such immense amounts are produced here that it has not been possible to care for all of it, either in the matter of storage tanks or cars for transporting it, and as a result large amounts have been wasted. In Oklahoma within a space of less than two square miles one million barrels of forty-two gallons each of petroleum were wasted in the year 1906. The Gulf field lying in Texas and Louisiana has been developed entirely since 1901. The first well was drilled near Beaumont, Texas, as an experiment to determine whether oil could be found. Small storage tanks were provided and it was hoped to find oil enough to make drilling profitable. The well proved to be a "gusher" of such magnitude that before sufficient tanks could be provided, or the flow checked, more than half a million barrels were wasted on the ground. The Gulf petroleum contains a large amount of asphalt and a small amount of gasolene and lamp oil. It has been used principally for burning as crude oil in locomotives and has sold as low as ten cents per barrel; but lately methods of refining have been perfected which produce good lubricating oil and a gasolene of high value from these low-grade oils. The last great field is found in California. The oil is similar to the Gulf oil, and investigation has shown that the quantity is greater in this field than in any other. It is used largely for fuel and power on account of lack of other fuels in that region. In addition to these fields there are small ones in Colorado and Wyoming, and promises of fields in New Mexico, Utah, Idaho, Montana, Oregon and Washington.