"On the Inheritance of Some Characters in Wheat," A. and G. Howard, Mem. Dep. of Agr. India, V: 1-46, 1912. This careful and important work has never received the recognition it deserves, apparently because few geneticists have seen it. While the multiple factors in wheat seem to be different, those reported by East and Shull appear to be merely duplicates.

"The Nature of Mendelian Units." By G. N. Collins, Journal of Heredity, V: 425 ff., Oct., 1914.

Dr. Castle, reviewing Dr. Goddard's work (Journal of Abnormal Psychology, Aug.-Sept., 1915) concludes that feeble-mindedness is to be explained as a case of multiple allelomorphs. The evidence is inadequate to prove this, and proof would be, in fact, almost impossible, because of the difficulty of determining just what the segregation ratios are.

In strict accuracy, the law of ancestral inheritance must be described as giving means of determining the probable deviation of any individual from the mean of his own generation, when the deviations of some or all of his ancestry from the types of their respective generations are known. It presupposes (1) no assortative mating, (2) no inbreeding and (3) no selection. Galton's own formula, which supposed that the parents contributed ½, the grandparents ¼, the great-grandparents ⅛, the next generation ⅟16, and so on, is of value now only historically, or to illustrate to a layman the fact that he inherits from his whole ancestry, not from his parents alone.