142 A Manual of Veterinary Physiology. 



The Succus Entericus is prepared by the glands of the 

 small intestines. In the duodenum we meet with the 

 glands of Brunner and the follicles of Lieberkuhn, the 

 latter supplying a considerable quantity of intestinal juice, 

 whilst the secretion from the former is scanty. Brunner's 

 glands, which are very large in the horse, are arranged on 

 the same principle as the gastric glands, whilst those of 

 Lieberkuhn are tubular glands, amongst the lining cylin- 

 drical epithelial cells of which numerous mucus-forming 

 goblet cells may be found. 



Colin endeavoured to obtain succus entericus by clamp- 

 ing a loop of bowel in the horse ; by this means he 

 obtained from 6i feet of small intestine 2-8 ozs. to 4 ozs. of 

 fluid in half an hour. 



We have no satisfactory analysis of intestinal fluid in the 

 horse ; it is probable that the methods adopted to obtain it 

 are not completely satisfactory, nor is it likely that, in spite 

 of the precautions taken, it can be obtained free from 

 bile, pancreatic fluid, or gastric juice. Colin states that the 

 juice he obtained was mixed with a little mucus, which he 

 got rid of by nitration ; the fluid was then clear, of slightly 

 yellow colour, saltish taste, alkaline reaction, specific gravity 

 1010, and its analysis showed it to be composed as follows : 



Water - - - 98'15 



Albumin - - - "45 



Chloride of sodium \ 



Chloride of potassium r 1*45 



Phosphate and carbonate of soda J 



Colin endeavoured to obtain the secretion of Brunner's 

 glands in the horse by ligaturing the common duct and 

 pylorus, and emptying the bowel. In an hour he obtained 

 28 ozs. of viscous thick liquid of saline taste, slightly 

 alkaline reaction, specific gravity 1008, and it was found to 

 give the following analysis : 



Water - 98'47 



Mucus - - - "95 



Chloride of sodium 



< iarbonate <>f Boda 



Bypophosphate of lime - '10 



