the other as seen by the left. When viewed through a stereoscopic device, the two images merged. The BBC, still focused on radio, reacted negatively to a new technology from Baird that complicated their existence. However, in 1929, they allowed Baird to use their medium-wave transmitters to broadcast experimental television programs. The morning broadcasts each lasted thirty minutes. Sound and vision alternated every two minutes. In 1930, Baird and the BBC achieved simultaneous transmission of picture and sound. In 1931, Baird helped the BBC make its first-ever-scheduled outdoor transmission. Viewers in a London theater saw the Derby broadcast direct from Long Acre, filmed from a van situated next to the finish line. As the winner, Cameronian, galloped past the post, viewers heard the roaring crowd, almost as if they were there themselves. The event was such a huge success, that the BBC repeated it in 1932. On August 22, 1932, the BBC inaugurated a 30-line television system. It produced a pinkish picture that was received horizontally. A lift-up lid, with a mirror on the underside, displayed the image. One was installed at 10 Downing Street and, by 1933, almost 10,000 TV receivers had been sold in the UK. Nevertheless, Baird was frustrated with TV's general progress. He was restricted by British regulations to the use of medium-wave transmission. This limited him to thirty lines of resolution with only 12.5 frames sent each second. Later, as ultra short waves were introduced, he increased his resolution to 600 lines with a higher frame rate. In the U.S., television was still experimental; no sets were installed in homes. In 1930, RCA demonstrated large-screen television at a theater in New York. The screen consisted of more than 2,000 small lamps that each contributed to a particular element in the picture. Elsewhere, the big news was radio. Its popularity had exploded, and stations proliferated, and transmissions began to encroach upon one another. All the activity over the airwaves prompted Congress to create t