Orton, Burdach (Traite de Physiologie), and Dr.William Sedgwick have all remarked on this physical resemblance; and Dr.Metcalfe, in a dissertation delivered before this society in 1855, observed that in the cases of widows remarrying the children of the second marriage frequently resemble the first husband.
"An observation probably having some bearing on this subject was made by Count de Stuzeleci (Harvey, loc.

cit.).

He noticed that when an aboriginal female had had a child by a European, she lost the power of conception by a male of her own race, but could produce children by a white man.

He believed this to be the case with many aboriginal races; but it has been disproved, or at all events proved to be by no means a universal law, in every case except that of the aborigines of Australia and New Zealand.

Dr.William Sedgwick thought it probable that the unfruitfulness of prostitutes might in some degree be due to the same cause as that of the Australian aborigines who have had children by white men.
"It would seem as though the Israelites had had some knowledge of telegony, for in Deuteronomy we find that when a man died leaving no issue, his wife was commanded to marry her husband's brother, in order that he might 'raise up seed to his brother.'" We must omit the thorough inquiry into this subject that is offered by Mr.Blaikie.The explanations put forward have always been on one of three main lines:-- (1) The imagination-theory, or, to quote Harvey: "Due to mental causes so operating either on the mind of the female and so acting on her reproductive powers, or on the mind of the male parent, and so influencing the qualities of his semen, as to modify the nutrition and development of the offspring." (2) Due to a local influence on the reproductive organs of the mother.
(3) Due to a general influence through the fetus on the mother.
Antenatal Pathology .-- We have next to deal with the diseases, accidents, and operations that affect the pregnant uterus and its contents; these are rich in anomalies and facts of curious interest, and have been recognized from the earliest times.