THE WORLD OF INVISIBLE LIFE 
13 
the glass slide of a microscope, we can then take 
a peep into the World of Little Things that 
we can never see with our unaided eyes. Under 
a microscope that enlarges things 500 times, 
we shall see a really marvelous picture. Who 
would have thought of such a thing! That 
drop of water is alive with tiny, odd-looking 
creatures moving about in it very swiftly. 
There are many different shapes among them. 
Some are fish-shaped, and some are globe- 
shaped. Others have a fine skeleton of lime 
or are covered with shells, like tiny snails. 
Some have countless, fine wavy hairs, like a 
fringe, around their edges, which they move 
back and forth, and by doing so are able to 
travel through the water. Among these little 
living beings that whirl about in the drop of 
water are also some curious thread-like objects. 
These are the plants of this wonderful world of 
the microscope. 
We see that this one drop of water contains 
a whole world of its own, with animal and plant 
inhabitants, which are as different in their 
Many interesting things may 
be seen through a microscope 
What can 
be seen through 
a microscope? 
Eye piece 
Objective 
