Mean Isotherms (Fahr) of the Globe for July 1920s.

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Photo credit: © Michelle Bridges / Alamy / Afripics
License: Royalty Free
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Keywords: ., 1900s, 1920s, 1925, climate, dickson, ephemera, globe, history, information, isotherms, july, map, meteorology, paper, patterns, social, vintage, weather