The Secret Life of the Electric Light

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.

SERIES 1:  vacuum cleaner sewing machine central heating system washing machine refrigerator television 

SERIES 2:  car internal combustion engine quartz watch   telephone radio set video recorder  

SERIES 3: fax machine lift word processor electric light photocopier the office

PLease visit for some excellent lights

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