the twentieth century. One of the first southern blues musicians to adapt the Hawaiian sound to the blues was Tampa Red, whose playing, says historian Gérard Herzhaft, "created a style that has unquestionably influenced all modern blues". The Mississippi Delta was the home of Robert Johnson, Son House, Charlie Patton and other blues pioneers, who used a prominent tubular slide on a finger. The first known recording of the bottleneck style was in 1923 by Sylvester Weaver, who recorded two instrumentals, "Guitar Blues" and "Guitar Rag". Western swing pioneers Bob Wills and Leon McAuliffe adapted his song, "Guitar Rag", in 1935 for the influential instrumental "Steel Guitar Rag". Blues musicians played a conventional Spanish guitar as a hybrid between the two types of guitars, using one finger inserted into a tubular slide or a bottleneck with one finger while using frets with the remaining fingers (usually for rhythm accompaniment). This technique allows the player to finger the frets on some strings and use the slide on others. Slide players may use open tunings or traditional tunings as a matter of personal preference. Lap slide guitar is not a specific instrument but a style of playing a lap steel guitar usually referring to blues or rock music. Country music The earliest record of a Hawaiian guitar used in country music is believed to be in the early 1920s when cowboy movie star Hoot Gibson brought Sol Hoopii to Los Angeles to perform in his band. In 1927, the acoustic duo of Darby and Tarleton expanded the audience for acoustic steel guitar with their Columbia recording of "Birmingham Jail" and "Columbus Stockade Blues". Jimmie Rodgers featured an acoustic steel guitar on his song "Tuck Away My Lonesome Blues" released on January 3, 1930. In the early 1930s, acoustic lap steel guitars were not loud enough to compete with other instruments, a problem that many inventors were trying to remedy. Resonator guitars In 1927, the Dopyera brothers patented the resonator guitar, a non-electric device resembling a large inverted loudspeaker cone attached under the bridge of a guitar to make it louder. The name "Dobro", a portmanteau of DOpyera and BROthers, became a generic term for this type of guitar, popularized by Pete Kirby ("Bashful Brother Oswald") on Nashville's Grand Ole Opry for 30 years with Roy Acuff's band. He played the instrument while standing with the guitar facing upward held horizontally by a