Chapter III
Reading edition
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.