dying out" (page 333).

Mr.
Galton supposes, in sexual reproduction, where two parents contribute germs to the embryo the chance of deficiency of any of the necessary germs is greatly diminished.

Darwin's "very different view of the meaning or cause of sexuality" is no doubt that given in "Cross and Self Fertilisation"-- i.e., that sexuality is equivalent to changed conditions, that the parents are not representative of different sexes, but of different conditions of life.) 4.

I have ordered "Fraser's Magazine" (271/5.

"The History of Twins," by F.Galton, "Fraser's Magazine," November, 1875, republished with additions in the "Journal of the Anthropological Institute," 1875.