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ber of other chemicals, as alumen, argentum nitricum, cre- 
olin, lysol, lysoform, acid, pyrolign and glycerine, but the 
iodine treatment gave the best result. 
The success of the treatment depends to a large extent 
upon the age of the affection. Very often the treatment has 
to be repeated at frequent intervals. 
The Persistent Yellow Bodies. 
Much attention has been paid in this country to the cor- 
pus luteum persistens as the cause of sterility in cows; espe- 
cially in of late years the pressing out of the yellow bodies 
has been used very frequently in the treatment of sterility. 
It was supposed that this operation would not only excite 
ovulation, but would cure also the different affections of the 
metra. The treatment has even been used by farmers, in 
the hope of having in it a simple cure of these troubles. 
It is, however, no longer doubtful that those expectations 
were exaggerated; disappointments were frequent, as was 
inevitable when people thought to find in this operation the 
universal cure of all genital troubles in cows. 
So far, it is not known how the yellow bodies are formed, 
whether from the tunica interna or from the membrana 
granulosa; nor is their physiological function clear. Among 
practitioners there is no knowledge about the significance 
the yellow bodies may have in regard to sterility. 
One needs only to compare the opinions of Nielsen and 
Poulsen. Nielsen contends that the loosening of the yellow 
body has the same effect as the complete pressing out, while 
Poulsen states that the pressing out has to be quite com- 
plete. It can be demonstrated, however, that neither the 
loosening nor the pressing out are necessary operations to 
produce a speedy appearance of the heat; a simple massage 
of the uterus or a warm infusion in the vagina produces the 
same result. 
Moreover, it is more reliable and safer to treat the affec- 
tions of the uterus than to try to produce an estrum by 
pressing out the yellow bodies. 
