geological causes could have had only an infinitesimal effect upon
the. general climate of the globe."[1]

Let us reason together:--

The ice, say the glacialists, caused the Drift. What caused the ice?
Great rains and snows, they say, falling on the face of the land.
Granted. What is rain in the first instance? Vapor, clouds. Whence
are the clouds derived? From the waters of the earth, principally
from the oceans. How is the water in the clouds transferred to the
clouds from the seas? By evaporation. What is necessary to
evaporation? _Heat_.

Here, then, is the sequence:

If there is no heat, there is no evaporation; no evaporation, no
clouds; no clouds, no rain; no rain, no ice; no ice, no Drift.

But, as the Glacial age meant ice on a stupendous scale, then it must
have been preceded by heat on a stupendous scale.

Professor Tyndall asserts that the ancient glaciers indicate the
action of heat as much as cold. He says:

"Cold will not produce glaciers. You may have the bitterest northeast
winds here in London throughout the winter without a single flake of
snow. Cold must have the fitting object to operate upon, and this
object--the aqueous vapor of the air--is the direct product of heat.
Let us put this glacier question in another form: the latent heat of
aqueous vapor, at the temperature of its production in the tropics,