clear my path by using phrases easily understood, and avoiding questions too intricate, and subtleties too refined. As I do not wish to anticipate any of my conclusions, I forbear to enter into a general view of the principles it is my object to support: For believing the subject to be connected in a chain of reasoning, however loosely in some parts, I have the less reluctance in requesting my reader to follow it, with what patience he may be able to exercise, to the end. I do not flatter myself that the view I have taken is original; yet I think it, on the whole, important. Neither do I flatter myself, that the inferences I have drawn will be generally received; though I believe them to be founded in Truth. For, some of them seem to be opposed to great authorities; but I have satisfaction in thinking that they are not opposed to the greater authority of Scripture. In reference therefore to the authors with whom I differ-and I am not alone in differing from them—I can feelingly apply the often quoted saying,-Amicus Socrates, amicus Plato, sed magis amica Veritas. GENERAL VIEW OF DIFFERENT WRITERS OPI- NIONS ON THE SUBJECT: THE ARRANGE- MENT PROPOSED. INSTINCT CONTRASTED Sect 1. General view of different writers opi- EXAMPLES OF INSTINCT IN THE WORKs of ANIMALS, AND THE CARE OF THEIR YOUNG, AND CHOICE OF FOOD-REMARKS ON THE ADAPTATION OF STRUCTURE TO CLIMATE, ib. PAGE 2. Of the perfection of the natural Senses, as distinguishable from Instinct.... 3. Of the migrations of Animals ........ 70 4. Of the power of Reasoning in Animals 77 OF THE ASCENDING SCALE OF INSTINCTIVE OR UNCONSCIOUS MOTIONS-COMPRISING IN- 3. Imperfection of Reason............. 173 OF REASON, AND THE EXTREMES OF OPINION RESPECTING IT-ITS EXTENT OR USES, AND |