License, verbatimUS-PD
The New York Public Library states no known U.S. copyright for this item. Pinax admits it as US-PD only because the work predates 1900, making public domain near-certain worldwide; status outside the U.S. is not asserted and reuse elsewhere is the user's responsibility. Credit: From The New York Public Library.
Physikalische Beobachtungen des Capitain-Lieutenant Baron v. Wrangel wahrend seiner Reisen auf dem Eismeere in den Jahren 1821, 1822 und 1823. 1821 (from title). The New York Public Library.