Double 'canals' Phison and Euphrates as observed 1894 November 18. From Percival Lowell 'Mars' London 1896.

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Photo credit: © World History Archive / Alamy / Afripics
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Keywords: 18., 1894, 1896., america, archival, archive, astronomy, canals, double, euphrates, historical, history, london, lowell, mars, november, observed, percival, phison, planetary, science, scientist