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 |  | Woodhorn Colliery: RespiratorThis respirator dates to the 1920s. It works by filtering air for about an hour, hopefully giving the miner time to 
find cleaner air to breathe. The nose clip forced the user to breathe through the mouthpiece, in much the same way as 
divers use an aqualung.
 From here you can learn more about mine safety or browse the archive.
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