THE CELL AS A MICROBE 59 



pith. At the top of the tall structure appear en- 

 tirely new and different colonies to enable the 

 trunk to divide into many lofty branches, these 

 branches to subdivide into smaller branches, these 

 into still smaller branches, and the division to con- 

 tinue until it ends all around in the finest twigs. 

 Here appear another, entirely new and different 

 set of species some to build the buds, others the 

 leaves, others the blossoms, and others the ripen- 

 ing acorns. 



Here, at last, at the top of the tall trunk, is a 

 dense network of branches and boughs, a fit 

 counterpart of the network of roots and rootlets 

 at its base in the soil below. But the point of 

 this part of the example above the ground, like 

 that of the part below the ground, is to see that of 

 all the millions of the different colonies of cells, 

 while each one, like a colony of microbes, aims to 

 serve a particular part, it also has the higher aim 

 so to serve and adjust its part in its relations to 

 all the other parts built and adjusted by all the 

 other colonies, that all parts shall be harmo- 

 nious and symmetrical in their proportions, and 

 constitute a perfect oak. 



In this way is built up every many-celled vege- 

 table in the world. In every case the cell, like the 

 microbe, works single-handed to a certain extent, 

 but, at the same time, with the higher and loftier 

 aim in view, so to do its single-handed work that, 

 when done, it shall so unite with and fit all the 

 other single-handed work wrought by all the other 



