Professor Pearson and his school of biometrics here ignore or at least fail to record one of those significant "correlations" which form the basis of his method. The publications of the Eugenics Laboratory all tend to show that a high rate of fertility is correlated with extreme poverty, recklessness, deficiency and delinquency; similarly, that among the more intelligent, this rate of fertility decreases. But the scientific Eugenists fail to recognize that this restraint of fecundity is due to a deliberate foresight and is a conscious effort to elevate standards of living for the family and the children of the responsible--and possibly more selfish--sections of the community. The appeal to enter again into competitive child-bearing, for the benefit of the nation or the race, or any other abstraction, will fall on deaf ears. Pearson has done invaluable work in pointing out the fallacies and the false conclusions of the ordinary statisticians. But when he attempts to show by the methods of biometrics that not only the first child but also the second, are especially liable to suffer from transmissible pathological defects, such as insanity, criminality and tuberculosis, he fails to recognize that this tendency is counterbalanced by the high mortality rate among later children. If first and second children reveal a greater percentage of heritable defect, it is because the later born children are less liable to survive the conditions produced by a large family. In passing, we should here recognize the difficulties presented by the idea of "fit" and "unfit." Who is to decide this question? The grosser, the more obvious, the undeniably feeble-minded should, indeed, not only be discouraged but prevented from propagating their kind. But among the writings of the representative Eugenists one cannot ignore the distinct middle-class bias that prevails. As that penetrating critic, F. W. Stella Browne, has said in another connection, "The Eugenics Education Society has among its numbers many most open-minded and truly progressive individuals but the official policy it has pursued for years has been inspired by class-bias and sex bias. The society laments with increasing vehemence the multiplication of the less fortunate classes at a more rapid rate than the possessors of leisure and opportunity. (I do not think it relevant here to discuss whether the innate superiority of endowment in the governing class really is so overwhelming as to justify the Eugenics Education Society's peculiar use of the terms `fit' and `unfit'!) Yet it has persistently refused to give any help toward extending the knowledge of contraceptives to the exploited classes. Similarly, though the Eugenics Review, the organ of the society, frequently laments the `selfishness' of the refusal of maternity by healthy and educated women of the professional classes, I have yet to learn that it has made any official pronouncement on the English