CHECK PEDRO DELACABRA PLAYLISTS FOR MORE SECRET LIFE OF MACHINES

https://youtu.be/v0ES9TKAf_4

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A Scottish chemist called Joseph Swann tried passing electricity through fine wires (filaments) to make them glow white hot in 1860. Despite enclosing them in bulbs and pumping out the air, they quickly broke or blackened and Swann abandoned the idea. 17 years later, finding a better vacuum pump, he tried again. With no air left inside, the filament light bulb became a practical proposition.

Accompanying Sheet:

http://www.secretlifeofmachines.com/i...

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Thanks to Tim Hunkin the creator for allowing these excellent videos to be freely distributed on-line.