CHAPTER III.

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.


CHAPTER IV.

IS ANIMAL LIFE POSSIBLE ON MARS?
--Water and air essential for animal life
--Atmosphere of Mars assumed to be like ours
--Blue tint near melting snow the only evidence
of water
--Fallacy of this argument
--Dr. Johnstone Stoney's proof that water-vapour
cannot exist on Mars