This is one of the thematic world map sets from the rare 1861 edition of Johnson and Browning’s  Illustrated Atlas of the World .  Features two maps drawn within a single border.  The upper map depicts the world’s co-tidal lines with notations regarding world table lands and lowlands.  The lower map very attractively displays the important ocean currents.  Shading in the landmasses show the influence of various river systems.  Represents plates 11 and 12 in the 1861 edition of Johnson and Browning’s  Illustrated Atlas… .
<bdi><a href="https://en.wikipedia.org/wiki/en:Alvin_J._Johnson" class="extiw" title="w:en:Alvin J. Johnson"><span title="19th century United-States cartographer">Alvin Jewett Johnson</span></a>
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1862 (undated)
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