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isothermal chart

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"Carte des lignes isothermes." by Humboldt, 1817. This map was the first to show the use of isotherms, a term Humboldt coined for lines of equal temperature.

This Day in Geography: September 14

May 31, 2017September 14, 2016 by Caitlin Dempsey

Listed here are significant events relating to geography that occurred on September 14.

Categories Geography 101 Tags Humboldt, isothermal chart, This Day in Geography

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