This is A. J. Johnson’s fine 1862 map of the world on a hemispherical projection.  Offers a fascinating snapshot of the world during a period of rapid globalization and discovery.  Africa is largely “unexplored” though Lake Uniamesi, something that may be taken for an embryonic form of Lake Victoria, Lake Tanganyika or both, does appear.  This curious lake, supposedly identified by Speak, was frequently written of in mid century missionary reports as the source of several important African river stystems including the Congo.  The Antarctic continent is shown only sketchily, representing the relatively primitive state of Antarctic exploration in 1862.  Published by A. J. Johnson and Ward as plate numbers 4 and 6 in the 1862 edition of  Johnson’s New Illustrated Family Atlas .  This is the first edition of the Johnson’s  Atlas  to bear the Johnson &amp; Ward imprint.
<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>
</bdi>
1862 (undated)
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