Fax Machine - 25 mins
This Program begins with lovely demo of digital principle of fax messaging, Hunkin steps over image and waves to friend. Program explores history: Early 1800's a Scot invented idea having become interested in electricity. Demo of paper soaked in potassium ferrocyanide goes black when electricity passed through it. Earliest fax machines in museum. Commercial use in France in 1860's. Demo of how semiconductor affected by light - hence modern fax technology. Earliest photo sent by fax in 1906. Demo of picture made by string round drum (picture). Other demo using lathes in synch. Telegram service slowed introduction of fax. Early film commercial shows advantage of fax Vs bike messenger. Principle of digitising image. Thermal paper fax. Finally, faxes talk to faxes over phone lines!
Program 1: Fax Machine
Program 2: Photo Copier Machine
Program 3: Lift/Elevator
Program 4: Electric Light
Program 5: Computer/Word Processor
Program 6: Office
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