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Scientific American, Vol. 32, No. 15 (1875) (1875)
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are within the same, so that above them inserted in the receptacle shown and extending over all is a large near thehand wheel, and thence are empty chamber, E. With the lat- blown upward until they strike a ter, however, esch compartment curved guide, which causes them to communicates by an… … at the same time (by removing the last mentioned aggregate therefrom, and passes the message at once to the proper ope” between 40 and 50 miles per hour, the pipes being six and eight inches in diameter. This general design of postal © 1875 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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