80 



Veterinary Elements. 



place is yet a moot point, the opinion held by the best 

 authorities is, that the secretion of the greater part of 

 the milk goes on during the act of milking. It is now 



held that the nerv- 

 ous system has 

 largely to do with 

 the production of 

 milk, a reasonable 

 conclusion when we 

 remember that the 

 activity of a gland 

 depends largely on 

 its blood supply, 

 that supply being 

 controlled by the 

 nerves, whose ac- 

 tion is to contract 

 or widen the blood 

 vessels. 



Boehrig describes a nerve which leaves the spinal cord 

 and goes to the udder, filaments from its branches go to 

 the teats, the cisterns and the alveoli. "When the teats 

 are worked with the hands the nerves surrounding them 

 are irritated, and through them the secreting glands are 

 stimulated, causing their contraction and the discharge 

 of their contents. 



The veins along the belly leave the front of the udder 

 and go forward in a more or less winding manner, branch 

 more or less often, and eventually disappear through 

 holes in the abdominal floor, termed milk wells, then 

 pass along on the inside on the upper side of the breast 



A Well-balanced Udder. 



