New Data on the Distribution of the Rh Blood Types.

New data have been compiled with the aid of improved testing sera, on the distribution of the 8 Rh blood types among white individuals in New York City. Statistical analysis of these data by the gene frequency method yielded results in satisfactory agreement with the expectations under the six-gene theory. The distribution of the Rh blood types among Negroes is strikingly different from the distribution among white individuals; the most pronounced differences involving the frequencies of type Rho and the so-called intermediate types. Striking differences between whites and Negroes also exist with respect to the distributions of agglutinogens P and Hr.