Unpublished smooth sheet of Current Observations taken o the U.S.C.S. Schooner HUMBOLDT between San Francisco and the Aleutian Islands 1871-1872. Observations made by William H. Dall. Includes graphical comparison of air temperature and sea surface temperature, notation on winds, and current direction and velocity.
Photo Category: Historic Ocean Cartography
Photo Date: 1872
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| Added On | 18th October 2015 |
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