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Percy Sladen Trust expedition 1905 magnetic variation transactionsofli214linn 0024
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Percy Sladen Trust expedition 1905 magnetic variation transactionsofli214linn 0024

Chart of curves of equal magnetic variation in the Indian Ocean, from the Percy Sladen Trust expedition in 1905.

Date
December 31, 1912
Mapmaker / publisher
Author of article: Boyle T. Somerville (1863-1936)
Place
Madagascar
Archive
Wikimedia Commons
Type
map
Original size
2,316 × 1,968 pixels

Public domainsafest

Reason: its maker died more than 70 years ago.

Read from: Commons licence category: PD-old-70-expired; no CC BY, CC BY-SA, GFDL or deletion tag on the file page.

Credit line

"Percy Sladen Trust expedition 1905 magnetic variation transactionsofli214linn 0024" (December 31, 1912). Author of article: Boyle T. Somerville (1863-1936), via Wikimedia Commons. Public domain. https://commons.wikimedia.org/wiki/File:Percy_Sladen_Trust_expedition_1905_magnetic_variation_transactionsofli214linn_0024.jpg

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