h that at the main station, already described. The re- an increasing velocity and decreasing pressure (the re- by means of the closed receiver. Fig. 4, which consists, like the transmitter already described, of a movable ceiver at the main station, however, is entirely different sult of its… … Conatructed Proposed. the main tube to receive the carrier, and then swung to the various Scientific American publications ex- ll.-FBESENT AND FBOFOSED POSTAL TTTB£ LINES IN back into line where the current of air could act upon pire. the carrier and force it into the main tube. The ends NEW YORK…
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