John Logie Baird (1888-1946), Scottish engineer and inventor, with his television of 1925-1926. Baird was the first to demonstrate a working television system. His system used mechanical picture scanning and a transmitter with electronic amplification at the transmitter and receiver. The signal could be transmitted by telephone line or radio. Baird donated this television transmitter to the London Science Museum in 1928. On the far left of the case is 'Stookie Bill', a ventriloquist's dummy used by Baird. Next to the dummy is the Nipkow disk which scanned the subject and produced a picture signal.