the realm of sympathetic appreciation, unlike the economic, knows no definite bounds, and promises in time to bring all the more important organic forms under the care of the sympathetic and masterful being who has been chosen as the ruler of terrestrial life. We thus see that the matter of domesticated animals is but a part of the larger problem which includes all that relates to man's destined mastery of the earth--a mastery which he is rapidly winning. It means that, in time, a large part of the life of this sphere is to be committed to his care, to survive or perish as he wills, to change at his bidding, to give, as other subjugated kinds have done, whatever of profit or pleasure they may contribute to his endless advancement. From this point of view our domesticated creatures should be presented to our people, with the purpose in mind of bringing them to see that the process of domestication has a far-reaching aspect, a dignity, we may fairly say a grandeur, that few human actions possess. If we can impress this view, it will be certain to awaken men to a larger sense of their responsibility for, and their duty by, the creatures which we have taken from their olden natural state into the social order. It will, at the same time, enlarge our conceptions of our own place in the order of this world. In the following pages little effort has been made to present those facts concerning domesticated animals which would commonly be reckoned as scientific. The several essays which, in larger part, were separately printed in Scribner's Magazine, are intended for those persons who, while they may not care to approach the matter in the manner of the professional inquirer, are glad to have the results which naturalists have attained, so far as they may serve to extend knowledge of things which lie in the field of familiar experiences. To the text as it at first appeared, numerous additions have been made, and the concluding chapters, on the Rights of Animals, and on the Problem of Domestication, are new. In them an effort is made to direct attention to the importance of the problem of man's relation to the lower life which is about him, and which in the future far more than in the past is to be helped or hindered by his rule. Our life is made up of large problems; but there seem few that are greater than this, which concerns our duty by the creatures that share with us the blessings of existence, and over which we have come to rule. [Illustration: Sheep-Dogs Guarding a Flock at Night] THE DOG