For the present we must
be content if we can even picture this wonderful ocean of gas
spread round our earth, and some of the work it does for us.
We said in the last lecture that without the sunbeams the earth
would be cold, dark, and frost-ridden. With sunbeams, but
without air, it would indeed have burning heat, side by side with
darkness and ice, but it could have no soft light. our planet
might look beautiful to others, as the moon does to us, but it
could have comparatively few beauties of its own. With the
sunbeams and the air, we see it has much to make it beautiful.
But a third worker is wanted before our planet can revel in
activity and life. This worker is water; and in the next lecture
we shall learn something of the beauty and the usefulness of the
"drops of water" on their travels.
Week 10
LECTURE IV. A DROP OF WATER ON ITS TRAVELS
We are going to spend an hour to-day in following a drop of water
on its travels. If I dip my finger in this basin of water and
lift it up again, I bring with it a small glistening
drop out of the body of water below, and hold it before you.
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