G90 RESULTS OF THE SPAYING OF COWS. 
nium and laxatives in such cases. In most instances of reten¬ 
tion of the placenta the symptoms are such as I have enumerated. 
I seldom venture to bleed so shortly after parturition, particu¬ 
larly when the patient is thin in flesh, lest great debility should 
follow. I have had numerous opportunities of witnessing the 
most beneficial results from the above treatment in my own 
practice; I am, therefore, induced to send you these facts for 
insertion in your valuable periodical, should they be esteemed 
worthy of a place therein. 
RESULTS OF THE SPAYING OF COWS. 
Bj/ M, Levrat. 
The Veterinarian for August last contains a memoir 
on the castration of cows, accompanied by several cases. These 
cases, however, were drawn up a very little while after the ope¬ 
ration, and could only indicate the immediate effects of it. It 
may be useful, now that more than a year has passed, to describe 
the present state of the animals. 
The cow which was operated on in June 1833 yields, when 
she is at grass, the same quantity of milk that she gave on the 
preceding year. 
The second, operated upon in November 1833, gives, when at 
grass, eleven (qy. quarts) of milk. 
The third, spayed in December 1834, yields, when at grass, 
seven and a half. 
The fourth, operated upon in March 1834, gives more than nine 
'pots. This cow, that was mischievous, and difficult to milk, 
seemed to be cured of her vicious habits by the operation; but she 
soon became as bad as ever, and is obliged to be hobbled in order 
to be milked. 
Two of these cows shewed symptoms of oestrum as before. 
In one of them it was not periodical, as in other cows: the other, 
that had, as already related, a large yellow mass in the place of 
the left ovary, has been at heat several times. She has gone 
to the bull, which has quieted her for awhile, but the heat has 
returned at irregular intervals. 
May not these facts lead us to believe, that the ovaries have 
only a secondary influence on the development of the oestrum, 
and that the uterus exerts the principal influence in the produc¬ 
tion of it. 
In neither the one nor the other of these cows did the milk 
undergo any alteration in quantity or quality during the period 
