72 THE FAIRY-LAND OF SCIENCE. 
beams 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. 
