Jeisia e 
Dg PML DIFF 
Mars, longitude 90°, 1909. 
7 - . 
periee 
@ tl sexe 
Minto: 
From drawing by Percival Lowell 
These drawings agree with the photographs taken of the planet. al- 
though made independently without any knowledge of what the photographs would show, some of the 
latter having been taken indeed at a station in Chile seven thousand miles away 
color and of their connection with the 
large dark green regions, which were 
then generally supposed to be lakes and 
seas, Schiaparelli was led to believe them 
to be rivers or channels dividing the 
continents, and thus they received from 
the 1892 the 
same linear markings were found to 
invade also the “ of Mars, and it 
was found too that the positions of 
This 
disproved the existence of the supposed 
seas. 
him name canale. In 
99 
seas 
these canals remained permanent. 
Then it was soon discovered by 
Dr. Lowell that the canals waxed and 
waned, that they had a “live” and 
“dead”’ season and thus he announced, 
in 1894, the theory that the canals and 
lakes of Mars were not water but strips 
and oases of vegetation sustained by the 
waters of the melting polar snow-caps, 
and distributed over the arid planet by 
an artificial canal system constructed 
by intelligent beings. 
As time passes and our knowledge of 
Mars increases, this theory becomes more 
It satisfies all the 
facts brought out by observation and 
and more probable. 
accounts for the remarkable changes 
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