45 
metritis even with the utmost care, if one is forced to oper- 
ate, be it on account of a dystocia, or removal of the 
secundinae. 
While therefore there is a big difference between the indi- 
vidual herds in regard to the number of animals affected and 
in the virulence of the infection; there is a certain conformity 
between the number of acute and septic metritis cases and the 
number of sterile animalsinaherd. In other words, in stables 
where many cows with purulent or septic discharge from 
the genital organs are found, there are also many animals 
which have difficulty with conception. 
Here are a few illustrations: On the ‘“Tranekjaer’” 
farms, where the conditions of hygiene, feed and care were 
uniform and beyond criticism, there were big differences in 
the number of cases, and in the course of the chronic as well 
as of the acute metrites. On all three farms the stables 
were new, with beton floors, splendid light and ventilation, 
peat being used asa litter. The cows were carefully groomed 
and during the summer went out on the pasture every day 
from 8 a. m. until 2 p. m. To be brief, the general condi- 
tions were splendid. As I began the treatment in May, I 
found in Paeregaard a smaller number of pregnant cows 
than in Slotsladegaard and in Groenslettegaard, but a bigger 
number of purulent and chronic metritis and endometritis 
cases. Of the 170 cows in Paeregaard I treated 122 during 
the year, and only 59 became pregnant without treatment. 
Ninety cows had inflammatory processes in the uterus or in 
the cervix, and eleven animals which were treated proved 
to be normal; in seventy the changes were so extensive that 
they could be recognized by the rectal examination; thir- 
teen cows had aborted, and a number had retained the 
placenta. On the first visit especially, many cases of septic 
or purulent metritis were found, some of which were invet- 
erate and resisted all attempts at treatment, but the cases 
of metritis which came up during the following year were 
also much more malignant than at the other two farms. The 
