milk will take place at parturition, even when the nervous
connection has been destroyed. Mironoff found that, when the
mammary gland is completely separated from the central nervous
system, secretion, though slightly diminished, still continued.
In two goats he cut the nerves shortly before parturition and
after birth the breasts still swelled and functioned normally
(_Archives des Sciences Biologiques_, St. Petersburg, 1895,
summarized in _L'Année Biologique_; 1895, p. 329). Ribbert,
again, cut out the mammary gland of a young rabbit and
transplanted it into the ear; five months after the rabbit bore
young and the gland secreted milk freely. The case has been
reported of a woman whose spinal cord was destroyed by an
accident at the level of the fifth and sixth dorsal vertebræ,
yet lactation was perfectly normal (_British Medical Journal_,
August 5, 1899, p. 374). We are driven to suppose that there is
some chemical change in the blood, some internal secretion from
the uterus or the ovaries, which acts as a direct stimulant to
the breasts. (See a comprehensive discussion of the phenomena of
the connection between the breasts and sexual organs, though the
conclusions are not unassailable, by Temesvary, _Journal of
Obstetrics and Gynæcology of the British Empire_, June, 1903).
That this hypothetical secretion starts from the womb rather than
the ovaries seems to be indicated by the fact that removal of
both ovaries during pregnancy will not suffice to prevent
lactation. In favor of the ovaries, see Beatson, _Lancet_, July,
1896; in favor of the uterus, Armand Routh, "On the Interaction
between the Ovaries and the Mammary Glands," _British Medical
Journal_, September 30, 1899.

While, however, the communications from the sexual organs to the breast