s in the young heifer. Apart from these,
the castrated heifer is practically immune from any trouble of the
generative apparatus. Even the virgin heifer is little subject to such
troubles, though she is not exempt from inflammations, and above all, from
morbid growths in the ovaries which are well developed and functionally
very active after the first year, or in precocious animals after the first
few months of life. The breeding cow, on the other hand, is subjected to
all the disturbances attendant on the gradual enlargement of the womb, the
diversion of a large mass of blood to its walls, the constant drain of
nutrient materials of all kinds for the nourishment of the fetus, the risks
attendant and consequent on abortion and parturition, the dangers of
infection from the bull, the risks of sympathetic disturbance in case of
serious diseases of other organs, but preeminently of the urinary organs
and the udder, and finally the sudden extreme derangements of the
circulation and of the nervous functions which attend on the sudden
revulsion of a great mass of blood from the walls of the contracting womb
into the body at large immediately after calving.

In reviewing this class of diseases, therefore, we have to note, first,
that they are almost exclusively restricted to breeding animals, and
secondly that in keeping with the absolute difference of the organs in the
male and female we find two essentially distinct lists of diseases
affecting the two sexes.

EXCESS OF VENEREAL DESIRE (SATYRIASIS IN MALE, OR NYMPHOMANIA IN FEMALE).

This may occur in the male from too frequent sexual intercourse, or from
injury and congestion of the base of the brain (vasodilator center in the
medulla), or of the posterior end of the spinal cord, or it may be kept up
by congestion or inflammation of the testicles or of the mucous membrane
covering the penis. It may be manifested by a constant or frequent
erection, by attempts at sexual connection, and sometimes by the discharge
of semen without connection. In bad cases the feverishness and restlessness
lead to loss of flesh, emaciation, and physical weakness.

It is, however, in the female especially that this morbid desire is most
noticeable and injurious. It may be excited by the stimulating quality of
the blood in cows fed to excess on highly nitrogenous feed, as the seeds of
the bean, pea, vetch, and tare, and as wheat bran, middlings, cotton seed,
gluten meal, etc., especially in th