John Logie Baird presenting TV apparatus, Science Museum, 1926.

John Logie Baird presenting the transmitting portion of the original experimental Baird television apparatus to the Science Museum, September 1926. Baird (1888-1946) was a Scottish inventor. The transmitting portion, a large spinning cardboard disc containing 30 lenses in a spiral, was used to scan a puppet called Stooky Bill. As the disc rotated, each of the lens scanned a different part of the subject. This was first suggested by Paul Nipkow (1960-1940) in Berlin in 1884. During 1929-35 the BBC transmitted experimental Television using this system, and a year later the world's first regular high definition television service begun.