When is considered, therefore, the immense good which the study and investigation of nature have accomplished, it is not at all surprising that the literature on the subject should be markedly in the ascendant. Natural science bids fair to be in a preëminent degree the pursuit of the coming man. There is no end to the books that have been written upon the subject during the past few decades, if not by specialists, but by men and women who have been well informed and who have made themselves fully capable of contemplating understandingly the world which lies about them. Our libraries are to-day quite affluent in books that are the handmaids of natural science. Michelet and Hugh Miller, in their day, opened glorious new worlds before a rising generation, and that generation is now doing excellent work under the inspiration of the impetus which it then received. Tait, Balfour Stewart, Dawson, Gray, McCook, Thompson, Scudder, Mrs. Treat, Olive Thorne Miller and others have done much to continue the interest, pleasure and enthusiasm awakened by those earlier writers, and even Darwin and Huxley themselves, in detailing their experiments, have not scorned to bring their thoughts within the range of narrower minds. But in the popularization of natural science no man has done more than Rev. J. G. Wood in his numerous works. Not only have his writings created in thousands a taste for nature-studies, but they have been no less the means of cultivating the observation, awakening enthusiasm and directing effort in the lines of original research and discovery. Certainly no one, as his many writings so abundantly attest, possessed a larger fund of knowledge concerning the powers and capabilities of the lower animals than this author. Few knew our domestic animals better than he, and none was more capable of judging of the mental and moral _status_ which they should occupy in the world of animals. It is true that men and women, eminent in theology, literature and science, had expressed a belief in the idea that the “latent powers and capacities” of the lower animals might be developed in a future life, but no one had felt secure enough in this belief to warrant more than a passing thought or two upon the subject.