Oil and gas shaped Texas history from early uses of oil by Indians in East Texas for medicinal purposes and by survivors of the DeSoto expedition to caulk boats in 1543 near Sabine Pass, through the first oil well drilled in Nacogdoches County in 1866, to the true launch of the industry in 1901 when the Spindletop gusher erupted near Beaumont. In the 1920s, discoveries in West Texas led to widespread development throughout the Permian Basin centered around Midland and Odessa. The basin extends north to include Terry County, where the first well was drilled in 1940 in the southern part of the Slaughter field. This well, Jacobson #1, tested at 828 barrels of 32-gravity oil per day, showing that the crude would make development of fields containing both oil and gas profitable. Oil is trucked to refineries to produce gasoline for cars and tractors, and gas is piped for processing to heat homes, produce electricity, and be converted into liquefied gas. Today, more than 2,000 oil and gas wells produce more than 4 million barrels of oil and almost 2 million cubic feet of gas per year, making oil and gas a major contribution to the economy as new technology supports continued production.