SCIENCE IN THE PLANT WORLD 
hairs will cause the trap to shut together and 
imprison any sweet-toothed member of the in- 
sect world which has happened to stray inside. 
An aquatic form of the same thing occurs in 
a species of Bladderwort which spreads a leaf- 
net cunningly shaped to look like a fish’s mouth. 
Frightened baby-fishes, accustomed to seek 
their mother’s throat in time of danger, some- 
times swim in and, brushing certain nerve-hairs 
near the entrance, cause the lips to close and 
leave them to slow dissolution. Both sinister 
and scientific are the movements of carniverous 
plants. | 
Far from being static or quiescent, the plant 
world is a kingdom of energetic, vibratory mo- 
tion—a motion which is cool and calculating 
and which rarely fails to accomplish its pur- 
pose. Even. the protoplasm of microscopic 
plant cells is in constant movement. If a thin 
slice of Sycamore bark be placed under a mic- 
roscope, a regular circulation of cell-liquid, 
suggestive of blood circulation in animals, can 
be observed. 
Plants show great skill in their use of water. 
It is their storage of liquid in their cells which 
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