And it need hardly be added that the familiar phenomenon of “passing for white,” with its inevitable consequences, must not be overlooked in examining the contention that “there is practically no negro blood in the one hundred and ten million whites.”

The claim that “there has been vastly less race mixture in the northern hemisphere” than is sometimes alleged, may be questioned in the light of some data which have been submitted to us for publication by Mr. J. C. Trevor, formerly one of the Eugenics Society’s Darwin Research Fellows and now University Lecturer in Anthropology at Cambridge. In Mr. Trevor’s paper, for which we hope to find room in our next issue, the ratio of mixed bloods (i.e. persons of partly European and partly non-European stock) to the total population of the United States is given as slightly over 7 per cent, Admittedly this figure can at best be only an approximation, but including as it does in its basis Kuczynski’s statement that to count 6o per cent of the negro inhabitants of that country as mulatto would be “a most conservative estimate,” it is more likely to understate the facts than overstate them. It is noteworthy that according to an eminent American scholar, the number of negroes of full blood was unduly exaggerated in the 1920 U.S. census, the last in which an attempt was made to assess the mulatto element by itself. And it need hardly be added that the familiar phenomenon of “passing for white,” with its inevitable consequences, must not be overlooked in examining the contention that “there is practically no negro blood in the one hundred and ten million whites.”…

Editor, “Eugenics and Mongrelization [Letter and Response],” Eugenics Review, Volume 32, Number 1 (April 1940): 29.

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