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  1. Hydraulic and nautical observations on the currents in the Atlantic ocean : forming an hypothetical theorem for investigation ; addressed to navigators by Governor Pownall ; to which are annexed some notes by Dr. Franklin.
    By: Pownall, Thomas, - Franklin, Benjamin,
    Publication info: London :Printed for Robert Sayer,1787.
    Contributed by: University of Pittsburgh Library System (archive.org)
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