Monday 10 December 2012
HOW ISAMBARD KINGDOM BRUNEL CREATED AN ATMOSPHERE
Rail pumping stations were constructed every three miles from Exeter to Starcross. Beneath the leading piston carriage hung a 15ft long piston, with small wheels outside the pipe that opened and closed an iron and leather-flap valve. The piston entered the end of the pipe and pressure from the atmosphere pushed the piston up the pipe.
© Kenneth Campbell
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