The Principles of Biology, Volume 1 (of 2)

PREFACE

TO THE REVISED AND ENLARGED EDITION.

Rapid in all directions, scientific progress has during the last generation been more rapid in the direction of Biology than in any other; and had this work been one dealing with Biology at large, the hope of bringing it up to date could not have been rationally entertained. But it is a work on the _Principles_ of Biology; and to br...