1 8 THE FAIRY-LAND OF SCIENCE. 
ing the use of the different organs ; how you breathe, 
and how your blood flows; how one animal walks, 
another flies, and another swims. Then you must 
learn something of the various parts of the world, so 
that you may know what is meant by a river, a plain, 
a valley, or a delta. All these things are not difficult, 
you can learn them pleasantly from simple books on 
physics, chemistry, botany, physiology, and physical 
geography ; and when you understand a few plain 
scientific terms, then all by yourself, if you will open 
your eyes and ears, you may wander happily in the 
fairy-land of science. Then wherever you go you 
will find 
" Tongues in trees, books in the running brooks, 
Sermons in stones, and good in everything." 
And now we come to the last part of our subject. 
When you have reached and entered the gates of 
science, how are you to use and enjoy this new and 
beautiful land ? 
This is a very important question, for you may 
make a twofold use of it. If you are only ambitious 
to shine in the world, you may use it chiefly to get 
prizes, to be at the top of your class, or to pass in 
examinations ; but if you also enjoy discovering its 
secrets, and desire to learn more and more of nature, 
and to revel in dreams of its beauty, then you will study 
science for its own sake as well. Now it is a good 
thing to win prizes and be at the top of your class, 
for it shows that you are industrious ; it is a good 
thing to pass well in examinations, for it shows that 
you are accurate ; but if you study science for this 
