awakening sympathy, curiosity, revenge, and gratitude, followed within a couple of months by pride, shame, deceitfulness, passionateness, cruelty, and ludicrousness, which show themselves at the moment the child appears to first exercise what we term true reason. From this point we see rapidly unfolded the higher products of intellectual development, the first of which is morality of a very indefinite kind, which immediately precedes articulation at the age of about fourteen months, being closely followed by knowledge of the use of various simple instruments, afterwards at the age of twenty months by concerted action, and still later by speech, which generally is effected at the age of two years, or rather earlier. Following quickly upon speech we observe judgment, recollection, and self-consciousness manifesting themselves, and, by the time the child has attained the age of two years and a half, morality of a definite kind makes its appearance. Tracing the child’s development still further, we find the next important intellectual manifestation—viz., superstition—to take place at about three years of age, while concurrently the following emotional products appear—avarice, envy, hate, hope, vanity, mirth, and a love of the beautiful, which are followed, in the course of a few months, by awe and an appreciation of art. From this age to the condition of adult life, the intellectual faculties develop according to the surroundings of the individual, while, on the emotional side, reverence, remorse, and courtesy make their appearance at about the age of five years, and melancholy and ecstasy at about the tenth year. In the foregoing ontogenetic mirror will be found the key to the unfolding of the great mystery of the evolution of mind in the animal kingdom. We have only to take the geological periods one after the other, and study the various life-forms found in each to see at once that, with the race, the order of sequence in the appearance of the intellectual and emotional faculties is precisely the same as with the individual. We may place the new-born infant intellectually on a par with the lowly molluscs or the vermiform little animals which existed in the Cambrian period, in which little organisms probably pain first made its entry upon the earth, followed by the appearance of pleasure, memory (conscious), and association of ideas in the lowly crustaceans of the later Cambrian and early Silurian periods. With the spiders, fishes, and crabs of the later Silurian and Devonian periods we have brought before us the faculty of recognising places of which these animals are capable, which places them intellectually on a level with a child of four or five months old.