In article ,
Max Demian wrote:
Prior to the renovation of the Royal Opera House just before the
Millennium, they used mercury arc rectifiers to power the First World
War submarine motors they used for the stage machinery.
Most theatres and cinemas had those for arc lamps and projectors, at one
time.
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*I wished the buck stopped here, as I could use a few*
Dave Plowman
London SW
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