Kosin store tv projector

"Countdown" connects the invention of the movie projector to improvements in castle fortifications caused by the invention and use of the cannon. The use of the cannon caused changes in castle fortifications to eliminate a blind spot where cannon fire could not reach. This improvement in castle defense caused innovation in offensive cannon fire, which eventually required maps. This caused the need to see things at long distances (like a mountain top) so the effect was the invention of the incandescent light, or limelight. Burke turns to the next ingredient for a movie projector, film. Film is made with celluloid (made with guncotton) which was first invented as a substitute for ivory in billiard balls. Next was the invention of the zoopraxiscope which was first used for a bet to see if a horse's hooves all left the ground at any point while galloping. The zoopraxiscope used frame by frame pictures and holes on the side to allow the machine to pull the film forward. Communication signals for railways using Morse's telegraph led to Edison discovering how to speak into a microphone creating bumps on a disc that could be played back—the record player. This final ingredient gave movies sound. In summary, Burke connects the invention of the movie projector to four major innovations in history: the incandescent light; the discovery of celluloid; the projector that uses frame by frame pictures on celluloid; and finally, recorded sound. Connections is a ten-episode documentary ...