Nature readers : $b Sea-side and way-side. No. 4 — John Shaqi
Nature readers : $b Sea-side and way-side. No. 4Wright, Julia McNair
Science
Nature readers : $b Sea-side and way-side. No. 4
Wright, Julia McNair
Nature study -- Juvenile literature; Readers
Heat, such as we cannot imagine, is the chief characteristic of our
globe at this stage. But being Afrites, and ourselves made of heat,
we shall not mind that. We see that the whirling hot ball has in it
all the atoms which will one day become solid rocks. But these atoms
are kept apart by heat, and are in a state like gas. As we Afrites
peer at the glowing, whirling ball, we see that there are two forces
at work within it. Heat is one force, keeping all particles expanded,
and not letting them come together; but there is another force called
gravitation at work also. This is a force which causes all things
to tend toward each other--to draw together. It is this force of
gravitation which first gives the gaseous ring its globe shape, pulling
its particles together; and as Afrites, we watch with interest the
results of this force by long and slow degrees condensing the matter of
the globe.
While this is going on, we perceive that two great changes are taking
place. First, the sphere is growing cooler, by radiating, or throwing
off its heat. Heat a poker red hot; wave it in the air, and it cools by
giving off its heat to the air. Thus the hot globe throws off some of
its heat as it whirls along its path in space. But as the sphere cools,
the loss of heat allows the particles to shrink and come together and
unite with each other. The uniting of some of these various simple
substances produces other substances, and as the cooling and uniting go
on, the great globe becomes smaller and smaller. As we are Afrites, and
not afraid of heat, we wander into this fluid ball, and we find that
by all this cooling, condensing, and uniting, the material for future
rocks is forming.
Still imagining ourselves Afrites, the next change does not please us
as well. We find that the outer particles of vapor in our great hot
ball, as they ascend into space and cool, unite with each other and
become a vapor like steam, and this steam cools and condenses into rain
and mist. If a plate is held before the nose of a tea-kettle from which
steam is rushing out, the steam condenses at once into drops of water.
If the plate with the water-drops on it is set out in sharply cold
winter air, it is at once covered with frost or ice. Thus it happened
with the vapor about that hot sphere, our world; and the rain and mist
fell back upon the glowing ball from which they had risen. They helped
to cool it and to increase the hardening, but they were also reheated
and sent off again as vapor, to cool once more in space.
If at that time we, as Afrites, had travelled to some other planet, and
taken a seat there to watch our world from a distance, we should then
have seen it in its greatest beauty as a heavenly body, because in that
age it was at its greatest size, and was far larger than now: also it
must have shone as a clear and lovely star, with a glory which has now
almost passed away.
Public-domain text, read in full here on John Shaqi.
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