Chapter 4 of 18
CHAPTER III.
Is Mars habitable? A critical examination of Professor Percival Lowell's book "Mars and its canals," with an alternative explanation · Alfred Russel Wallace
THE CLIMATE AND PHYSIOGRAPHY OF MARS,
—No permanent water on Mars
—Rarely any clouds and no rain
—Snow-caps the only source of water
—No mountains, hills, or valleys on Mars
—Two-thirds of the surface a desert
—Water from the snow-caps too scanty to supply
the canals
—Miss Clerke's views as to the water-supply
—Description of some of the chief canals
—Mr. Lowell on the purpose of the canals
—Remarks on the same
—Mr. Lowell on relation of canals to oases and
snow-caps
—Critical remarks on the same.