How is this to be done? Goddard has no cure-all to offer but urges first of all that the mental grade of each individual be accurately determined and education and occupation be provided suited to his capacity. This will tend to make the moron a useful and contented member of the community, not a menace to it. Segregation is recommended so far as practicable, but in view of the large number (estimated at 300,000 to 400,000 in the U. S.) Goddard considers segregation of all impracticable. Nevertheless he urges further and energetic efforts in this direction, that as many as possible may be segregated as a safeguard against their reproduction. In individual cases "sterilization wisely and carefully practiced" must be employed to insure non-reproduction. In this volume there is a pleasing absence of the rant which pervades some eugenic literature. The author has something of importance to contribute to science and he presents his contribution in a sober, dignified manner in keeping with the important character of his contribution. W. E. CASTLE. CHRISTIANITY: THE SOURCES OF ITS TEACHING AND SYMBOLISM. By J. B. Hannay. (Francis Griffiths, London; pp. 394). This is an attempt to expound the symbolism of the Christian religion. It is divided into three main parts: ancient cults (phallism and sun worship); ancient cults in the Old Testament; ancient cults in the New Testament. The author's main thesis can be stated in a sentence: the essential constituents of every religion, and the underlying meaning of its symbolism, are phallicism and sun worship. Of these the former is the more important, more primary, and more wide-spread; the latter is a superimposed layer better adapted to more civilized and educated people, but rarely penetrating into the hearts of the common people to the extent that the former has. "The great branches under which all the religious systems of the past have developed may be classed as based, on the one hand on the consideration of our world and the continuity of life upon it, expressed in Phallic symbolism, and on the other hand, on the Sun as the great giver and sustainer of man, expressed in Solar symbolism." (p. 21). "As the Phallic cult was much the older, it retained its position after the rise of the Solar cult. It required a much higher intelligence to grasp the facts of Solar worship, so it never entered the 'hearts' of the common people as did the Phallic worship, but it had a much more intelligent priesthood, and was the arbiter in all questions of dates, and regulated al) feasts; and, what was more important to the people, fixed the time for payments of debts or interest, and regulated the times of sowing and harvesting, so it became a much more 'official' religion than Phallism." In support of these conclusions the author marshals a huge number of facts, so that the work becomes a veritable encyclopaedia of symbolism.