ABSTRACT
The forces of nature comply with one another under appropriate conditions, just as they dominate each other, as we have already noted, under other circumstances. A river may be turned from one channel into another by a wall of rock which chances to crop out across its former course. The stream does not continue to attack an opponent stronger than itself, but complies with such an antagonist by letting the opponent have its own way, and by turning its own energies in another direction. If the path which a stream or other natural force will dominate is determined by the inferior strength of the materials dominated, so in the same way is the course which a river will not follow determined by the superiority of strength possessed by an opposed barrier.
