H2() 



THE PAirrS OF A SEED-PT.ANT 



to show not a little variety and complexitj' in tlio different 

 parts which compose it, and one is aware that much more 

 complexity of sti'ucture ^vould appear upon further studj". 

 But why the plant should liave such a complex structure 

 may not he at first so obvious. We are helped to an under- 

 standing of the matter, however, by remembering that 

 wherever there is much variety of work to be performed, it 

 is an advantage to have the labor divided among different 

 sets of vv'orkers, each fitted for their special share and cooperat- 



Fli;. 2S0. — Flax Bud cut vcrtn-allj- :iiiil luurh cularecd to shiiw tlic dcvolop- 

 nii'ut of the leaves from i)rutrusious arisiug at the side of the flome- 

 like steiu-tip whieh i-ousists of foriuati\'o material. (Orisinal.) 



ing with the rest. This principle is sliown clearlj' in the com- 

 munity to which we belong, where th<> labor of meeting the 

 needs of the jieople as a whole is di\'ided among farmers, 

 miners, manufacturers, merchants, soldii^-s, teachers, and 

 many other classes, while in each class the W(irk is divided 

 and subdivided again and again. The degree of sjiecialization 

 and c(jo))eration found in such advanced communities as our 

 own chiefly distinguishes them, as we know, from such h^ss 

 advanced communities as the Indian tribes which preceded 

 us upon the American c()ntin<'iit; and we say that this was 



