considerable interest, own gravity, landing in the box, H, whence it is again taken tioned at the receptacle lifts a little window in the compart- the pneumatic system of transmitting telegraphic messages out to be filled and started back on its journey. between the operating and receiving rooms in… … is provided with a cover opened or tion. In returning, they simply fall Fig. l.-ROOT'S BLOWER, APPLIED TO THE PNEUMATIC DESPATCH. closed at pleasure, thus, as will be through the tube and slide into a seen further on, throwing any tube into or out of action, suitable receptacle. This plan may be…
Patents · Iron · Boiler · Water · Improved · Inches · Cast Iron · Consists · Sewing machine · Latch bolt · Scientific American · Feet long · Rapid transit · Sir john · Improved car · Underground roads · Great number
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