Mars and Its Canals

by Percival Lowell

at junction of canals only, [255], [371].

Observations, mutual corroboration of, [165], [166];

among mountains, [7].

Organic Evolution, origin of, [356].

Orology, of Mars, [62].

Ovid, [25].

Oxygen, [83], [164], [166], [167], [341].

Paleozoic times on the Earth, [135].

Permian period, [142].

Personal equation, eliminated, [287].