Note 33 — Chapter XVI · INTERLUDES
Reading edition
In Popular Science Monthly, for September, 1907, Mr. Agassiz told his experience in observing at Flagstaff, and why the appearance of canals cannot be due to optical or visual illusions.
Reading edition
In Popular Science Monthly, for September, 1907, Mr. Agassiz told his experience in observing at Flagstaff, and why the appearance of canals cannot be due to optical or visual illusions.