Once established, an original river advances through its long life, manifesting certain peculiarities of youth, maturity and old age, by which its su….

The meaning of geography is as much a sealed book to the person of ordinary intelligence and education as the meaning of a great cathedral would be t….

The more clearly the immensely speculative nature of geological science is recognized, the easier it becomes to remodel our concepts of any inferred ….

It is the relationship between the physical environment and the environed organism, between physiography and ontography (to coin a term), that consti….

The very foundation of our science is only an inference; far the whole of it rests an the unprovable assumption that, all through the inferred lapse ….