gthntiiu Qmtxitm. 178 [March 24, 1877. [Continued from first page.] munication between the pressure … rest free in the chamber, M, and Fig. 5.-THE PNEUMATIC VALVE. drop out. When the tube is used for a as previously described, and the handle, H, drawn forward. constant succession of carriers from the out station, it is The sluice valve, S, first closes the orifice, P, after which the necessary to…
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