PHYSIOLOGY. 4I 
About five to six months in the Cow, and seven to 
eight in the Mare, the foetus can be felt in the 
uterus, and positive evidence thus established. This 
can best be done by Jdallottement, 7. e., by pressing 
against the abdomen several times with the closed fist, 
so as to produce a swinging movement, when the foetus 
can be felt falling against the hand. 
In the Cow, this method should be practised on 
the right side, as the large cavity of the stomach 
interferes with it on the left. 
In the Mare, percussion may be performed on 
either side, but the left is perhaps preferable. Another 
method adopted is to give the parent a drink of cold 
water, if possible, on an empty stomach. This often 
causes a movement of the foetus in the uterus, which 
can be seen through the wall of the abdomen, by 
looking at the right flank of the Cow, and the left 
of the Mare. 
An examination per rectum or vagina may be 
resorted to, to confirm the diagnosis. There is no 
objection to the examination per rectum, if it is 
imperative that the condition should be known, but an 
examination per vagina, besides considerably irritating 
the parent, in some.cases will lead to abortion. 
The method by auscultation is not satisfactory in 
our larger subjects. 
About the eighth month in the pregnant Cow, and 
about the tenth in the Mare, the external positive 
symptoms commence. 
The mucous membrane of the vulva becomes 
_ congested; the mammary glands become enlarged, the 
