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IS THE EARTH DRYING UP?
In a recent paper before the Royal
Geographical Society, Professor Gre-
gory discusses this question. It is be-
lieved by many that there is a pro-
gressive, world-wide change toward a
greater and greater degree of dryness.
Professor Ellsworth Huntingdon be-
lieves that there are alterations of
climate, it being sometimes drier,
sometimes moister, but with a ten-
dency to become generally drier. Mr.
R. Thirlmere believes that the climatic
changes take place in cycles, each cycle
lasting 2,000 years or more, and that
our world is at present cooling. From
an exhaustive analysis of the evidence,
Professor Gregory doubts the theory
of a universal tendency toward
drought, although there may be local
variations. The strongest evidence for
the desiccation theory is derived from
Central Asia, the majority of travellers
who have visited that region being
convinced of its progressive change to
a state of greater and greater dry-
ness.
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