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Philo Farnsworth demonstrated his invention of the first working all-electronic television system in San Francisco, CA on September 7, 1927.

Scottish inventor John Logie Baird had been the first to invent the electromechanical television system in 1926 in London.

Baird transmitted the first picture from one room to another in 1926. In 1927 John Baird used telephone wires to send a moving image from London to Glasgow.

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In 1929 ,the play "The Man with the Flower in his Mouth" was broadcast on the BBC.

In 1931, Baird made the first outdoor remote broadcast, of the Epsom Derby.[11] In 1932, he demonstrated ultra-short wave television. Baird's electromechanical system reached a peak of 240-lines of resolution on BBC television broadcasts in 1936 though the mechanical system did not scan the televised scene directly. Instead a 17.5mm film was shot, rapidly developed and then scanned while the film was still wet.

On November 2, 1936 the BBC began transmitting the world's first public television service from the Victorian Alexandra Palace in north London[12] following alternate daily test broadcasts of the Baird and Marconi systems to the Radio Show at Olympia at the end of August. It therefore claims to be the birthplace of television broadcasting as we know it today.

 http://en.wikipedia.org/wiki/History_of_television