2. The Palaeozoic or period of ancient life.
3. The Mesozoic or middle period of life.
4. The Neozoic or recent period of life.
These are all subdivided again, and other words more difficult to spell
are introduced into science, thus crowding out the vulgar herd who cannot
afford to use the high priced terms in constant conversation.
Old timers state that the primitive condition of the earth was extremely
damp. With the onward march of time, and after the lapse of millions of
years, men found that they could get along with less and less water, until
at last we see the pleasant, blissful state of things. Aside from the use
of water at our summer resorts, that fluid is getting to be less and less
popular. And even here at these resorts it is generally flavored with some
foreign substance.
[Illustration: THE MASTODON.]
The earth's crust is variously estimated in the matter of thickness. Some
think it is 2,500 miles thick, which would make it safe to run heavy
trains across the earth anywhere on top of a second mortgage, while other
scientists say that if we go down one-tenth of that distance we will reach
a place where the worm dieth not. I do not wish to express an opinion as
to the actual depth or thickness of the earth's crust, but I believe that
it is none too thick to suit me.
Thickness in the earth's crust is a mighty good fault.
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