of the text suggest only intellectual ideas to individuals in whom the feeling in question is naturally weak, and that such minds perceive no indelicacy in knowledge which is calculated to be useful; while, on the other hand, persons in whom the feeling is naturally strong, are precisely those who stand in need of direction, and to whom, of all others, instruction is the most necessary.’ No art in these days is better understood, by those who have found their interest in investigating the subject, than that of improving the races of the lower animals. Every species, upon which the effort has been made, has been found perfectly subservient to the art. The desirable forms and qualities are selected, and the proper means of improvement applied. The wished result is not obtained to its full extent in the first generation; but a uniform approximation commences; and every successive amelioration brings the animal nearer to the requisite standard. The whole art is founded on observation of the organic laws of the races, and the general fact, that the instincts, qualities, temperament, form and color of the animals are hereditary, and transmissible. These are truths so well known, that the grazier, and the shepherd apply them constantly in rearing their domestic animals. Shall they be disregarded, when it becomes known, that they bear equally upon the improvement of man, _next in dignity to angels_? Shall these considerations rear a nobler race of animals, and, by overlooking them, shall man alone be consigned to degradation? LETTER III. THE SAME SUBJECT CONTINUED.