71 



LYMPHATIC GLANDS. 



The absorbent or lymphatic glands are small globular bodies 

 varying in size " from a pea to a walnut " that are found lying 

 in the course of the absorbents. They are described as a " con- 

 tortion of lymphatic vessels" connected together by cellular 

 texture, having neither a oavity nor secreting duct. The vessel 

 appears to enter a contorted mass of vessels, and then pass out 

 again. These glands are linked together by absorbent tubes 

 of intercommunication. The minutest of the absorbent vessels 

 have but a single transparent membrane. As they require 

 force, however, they acquire strength by the addition of another 

 membrane, and finally the large trunks have three membranes. 



The lymphatic system is an exceedingly interesting and in- 

 structive object of study. They have a more important con- 

 nection with some diseases of the feet than is generally sup- 

 posed. 



THE NERVES OF THE FOOT. 



GENERAL REMARKS UPON THE NERVOUS SYSTEM. 



An eminent authority (Haycock) writes : " The nervous 

 system is one that, if contemplated in all its numerous and im- 

 portant relations, will be found to embrace the most compre- 

 hensive inquiries which physiological science can open to the 

 mind of man. 



" The horse, like all other highly-organized animals, is pos- 

 sessed of a nervous system, the structure of which is highly 

 complex, and the uses of which are two-fold : First, to place 

 the animal itself in intimate relation with the external world; 

 and, secondly, to place every member and every part of a mem- 

 ber in intimate relation with every other member and part of a 

 member. 



