r lines 3 inches. The lines are laid out radially, matic Tube Company, of Philadelphia, drew up plans an exhauster at the other. The modified system now air being compress- in use is worked by means of large storage tanks, con- ed at one end and taining either compressed or rarefied air, and it… … shaped in section, 9.-THE BEACH AUTOMATIC POSTAL DELIVERY BOX. lO.-THE BEACH PLAN OF DISPATCHING LETTERS FOR A BRANCH STATION. measuring 4"^ feet wide by 4 feet hi^h, the straight portion being of cast iron and the bends for a set of lines running from the general post office same year as that of…
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