combine with its fellows and form the higher animals seems to have
been the aim of the creative energy. First the cell, then
combinations of cells, then combinations of combinations, then more
and more complex combinations till the body of man is reached, where
endless confraternities of cells, all with different functions,
working to build and sustain different organs,--brain, heart,
liver, muscles, nerves,--yet all working together for one grand
end--the body and mind of man. In their last analysis, all made up
of the same cells--their combinations and organization making the
different forms.

Evolution touches all forms but tarries with few. Many are called
but few are chosen--chosen to lead the man-impulse upward. Myriads
of forms are left behind, like driftwood caught in the eddies of a
current. The clam has always remained a clam, the oyster remained an
oyster. The cockroach is about the same creature to-day that it was
untold aeons ago; so is the shark, and so are many other forms of
marine life. Often where old species have gone out and new come in,
no progress has been made.

Evolution concentrates along certain lines. The biological tree
behaves like another tree, branches die and drop off (species become
extinct), others mature and remain, while some central shoot pushes
upward. Many of the huge reptilian and mammalian branches perished
in comparatively late times.

As nothing is more evident than that the same measure of life or of
vital energy--power of growth, power of resistance, power of
reproduction--is not meted out equally to all the individuals of a
species, or to all species, so it is evident that this power of