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and to fall into the watery liquid with which it is filled. 
Even if they do not slip immediately, their efforts to 
crawl back over the rim are defeated by a row of teeth 
such as you see in the picture. 
The liquid at the bottom of the leaf is not rain water, 
as in the pitcher plant. It is given out by the leaf 
itself; and it contains an acid which dissolves the 
animals’ bodies, so that their more nourishing parts can 
easily be taken in by certain little cells which line the 
lower part of the pocket, and which have been brought 
up to this work. 
The next picture (Fig. 154) shows you a water plant. 
It is called the ‘‘ bladderwort,” because of the little bags 
