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.


CHAPTER II.

MR. LOWELL'S DISCOVERIES AND THEORIES,
--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.