PLANT BIOLOGY 



If the pupil extends his observation to animals, he 

 will still find the same truth; for probably no two living 

 objects arc exact duplicates. If any person finds two objects 

 that he thinks to be exactly alike, let him set to work to 



Fig. 2. — No Two Leaves are Alike. 



discover the differences, remembering that notliing in 

 nature is so small or apparently trivial as to be overlooked. 



Variation, or differences between organs and also be- 

 tween organisms, is one of the most significant facts in 

 nature. 



Suggestions. — The first fact that the pupil should acquire 

 about plants is that no two are alike. The way to apprehend this 

 great fact is to see a plant accurately and then to compare it with 



