742 



THE CIRCULATION. 



founder, etc. ; or if allowed to stand in a cold current of air, to 

 have an attack of pneumonia, or some other indication of vascular 

 disturbance before referred to, which would be scarcely felt if cool, 

 and the nervous system in a vigorous condition. 



It is evident also 

 that the quality of 

 blood being depend- 

 ent upon the food 

 taken, and the con- 

 dition of the air 

 breathed, it is neces- 

 sary that the food 

 should be clean and 

 of good quality. 

 No moldy grain, 

 hay, or other food 

 unfitted for proper 

 nutrition, should be 

 given, and the sta- 

 ble should be well 

 ventilated with pure 

 air at all times, and 

 all poisonous gases, particularly the ammonia which is formed 

 from the urine, should be allowed free egress from the stable, as 

 the animal cannot be expected to keep in good health while com- 

 pelled to inhale such malaria. 



It is needless to explain the bad effects upon the depurative 

 organs of the derangement of circulation by which these channels 

 are to a greater or less degree " clogged," or unable to do their 

 proper work. 



Now, it is within the province of every owner to prevent these 

 troubles by the exercise of care in feeding, exercise, etc., which is 

 much better and easier than to try to cure them when sick. It is 

 far easier to prevent a house from getting burned up by not letting 

 the fire get started, than to depend upon the power of putting it 

 out, for with the best of energy it may cause a destruction of the 

 building. So in the cure of diseases, it is a great deal better and 

 safer to take such measures as will pr'event them, for derange- 

 ments once started will often, in spite of the best of treatment, 



Fig. 634. — 1. Superficial layer of skin or cuticle; 2. 

 Rete mucosum; 3. Corium; 4. Duct of sweat gland; 5. 

 Sweat gland; 7. Sebaceous gland; 8. Walls of hair sac; 

 9. Root of hair; 10. Fat cells; D. Cellular tissue. 



