Excerpt from Essay on Instinct, and Its Physical and Moral Relations In so far as illustrations from Natural His tory were necessary to my purpose, I-h'ave not scrupled to avail myself freely of the scientific labours of others - I trust, however, \ with pro' per acknowledgments. And; though I con sider the speculations in the first part as but secondary and introductory to those in the second, I am aware, that there is a class of readers who will give them the preference. I have therefore studied to make the former more interesting to' this class, by a greater number of quotations than I should have other wise thought necessary. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.