The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 311
In the position of the. valve as sliown, the steam is admittedthrough S, passing through A into the cylinder, forcing the piston Pup. If it is wished to reverse the engine, we have only to move tliepiston valves to E E, as shown ; the steam being admitted through S,as before, passes through B B to…
Architecture · Civil engineering · Science
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