Is Mars Habitable?

-Mars the only planet the surface of which is

distinctly visible

-Early observation of the snow-caps and seas

-The 'canals' seen by Schiaparelli in 1877

-Double canals first seen in 1881

-Round spots at intersection of canals seen

by Pickering in 1892

-Confirmed by Lowell in 1894

-Changes of colour seen in 1892 and 1894

-Existence of seas doubted by Pickering and

Barnard in 1894.

-Observatory at Flagstaff, Arizona

-Illustrated book on his observations of

Mars

-Volume on Mars and its canals, 1906

-Non-natural features

-The canals as irrigation works of an intelligent

race

-A challenge to the thinking world

-The canals as described and mapped by Mr. Lowell

-The double canals

-Dimensions of the canals

-They cross the supposed seas

-Circular black spots termed oases

-An interesting volume.

-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.