![[Arctic] Magnetic Variation, Epoch 1960.O.](https://archive.org/services/img/Arctic-C41-1959)
Date: 1959-01-01
![[M.S. map prepared by N.A. Trausche for the completion of the aerial exploration of the Arctic by air].](https://archive.org/services/img/Arctic-C39-1926)
Date: 1926-01-01
Date: 1797-01-01
Date: 1901-08-22
Date: 1860-01-01
Date: 1989-01-01
Date: 1824-01-01
Date: 1824-01-01
Date: 1906-01-01
Date: 1969-01-01
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