A very attractive example of Johnson's 1866 diagram of the world's time zones. Consists of a circular engraving in which numerous clocks are drawn, each representing a major world city. At the center is clock representing the time in Washington, D.C. The time in Washington is set at 12 and the remaining clocks are adjusted accordingly. So, if it is 12 in Washington, it is 11:02 in Calcutta and 6:35 in Honolulu, etc. Published by A. J. Johnson and Ward as plate number 6 in the 1866 edition of  Johnson’s New Illustrated Family Atlas . This is the last edition of the Family Atlas to bear the Johnson and 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>
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1866 (undated)
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