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Location DB > United States > Massachusetts > North Reading > J.T. Berry State Rehab > Keystone Cops > SIMG0018 (Medium).JPG

10 / 52   SIMG0018 (Medium).JPG

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The projector room
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Posted by jjcoolj 10/13/2008 1:47 AM | remove
  Those are arc-discharge follow spotlights. Knobs on the back were used to move electrodes closer together as the electrode material was consumed by the electric arc.
Posted by jjcoolj 10/13/2008 1:49 AM | remove
  After seeing the next picture, though, it becomes clear that arc-discharge units are being used to provide projection illumination rather than follow-spot service.
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