succession of animals with higher and higher types of brain. At last man came to crown the organic series with a brain so complex in its parts that it ranks him as lord paramount of the earth.
EVOLUTION REQUIRES CONDITIONS. But mere ex
ternal conditions are not all that is required. A man needs ground on which to build a house. But the house is not generated and produced by the ground. The latter is only one out of several factors. At the end of each geologic age the conditions had become such as. to favor a higher kind of life. By passing through the form of organized bodies, matter becomes more and more vitalized; it acquires a more permanent tendency to vibrate in unison with the living forces, and it thus becomes more capable of being molded into new kinds of plants or animals. At every step of this progress the internal or vital forces have acted in concert with the external conditons to produce the new results.
Evolution describes the great methods of growth which rule in the world of living forms. It deals with the past, but it also foretells the future. And this latter work gives its greatest value to man