114 THE COW IN HEALTH AND DISEASE 



sels that are too small to allow the passage of 

 the corpuscles, then, from the process of trans- 

 fusion, the fluid part of the blood passes on 

 out among the tissues which are filled with 

 small spaces known as lymph spaces. In this 

 way the lymph carries nourishment to the cells 

 comprising this part of the body. These small 

 alveoli or acini in the udder act as lymph 

 spaces and are filled with lymph. The cells 

 lining these alveolar spaces extract a large 

 per cent of the solid matter and most of the 

 liquid from the lymph, and mixes it with the 

 fat cells that go to make up the fat of the milk. 

 This mixture is then carried down through 

 the various ducts to the galactophorous sinus 

 where it is stored until the next milking time. 

 The remainder of the lymph is carried back 

 through the lymph vessels and finally into the 

 blood circulation again. 



The quantity of lymph produced by a cow 

 in 24 hours is estimated at from 20 to 90 

 quarts, but this does not mean that this is all 

 the lymph that is in the cow's body. 



The quantity of water that the cow con- 

 sumes influences the flow of milk slightly but 

 to no great extent. The manner in which it 

 does this we are not able to explain. 



The fact that the lymph has a mixture of 

 some substances digested by the cow will no 

 doubt explain the manner in which some feed 

 will produce a characteristic odor in the milk 

 of the animal which has eaten it. 



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