STATIONARY ENGINES . 179 off the steam jet . In the event of the vacuum ever becoming impaired from any cause , the piston valve is instantly raised by the pressure of the spring below it , … a pair of engines coupled at right Fi2 ' II2 ' - Conden ^ vAh Seif - adj us tmg jet 0 r angles ; the only alteration being the addition of a second combining nozzle N , fixed beyond the first one , and communicating with a second branch pipe M , which brings the exhaust from the other cylinder of…
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