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 www.applelights.co.uk
for some excellent lights
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(C) 1988-1994 Tim Hunkin. All rights reserved. |