200 PHYSIOLOGY AND HEALTH. 



is one of the means of relieving the internal disorder. Ex- 

 posure to cold is sometimes followed by disturbance in the 

 organs of locomotion, and then we have rheumatism, pain, 

 and sometimes swelling in the muscles and joints. In this, 

 as well as in the other cases, the disorder is removed when 

 the balance of circulation is reestablished; for, when the 

 natural perspiration and the other cutaneous functions are 

 restored, the .rheumatism diminishes, and the limbs and 

 muscles become easy. 



490. We thus see that the skin stands not alone, but is 

 intimately connected with the internal apparatus of life, and 

 does not suffer, without their sympathy, nor enjoy the full 

 measure of health, without their participation in a greater 

 or less degree. 



491. Persons differ in the degree and distribution of their 

 health and strength ; all their organs and systems may not 

 have the same power of action, or of resistance to disturbing 

 causes. In one man the lungs, in another the organs of 

 locomotion, and in a third the digestive apparatus, and in a 

 fourth the nervous system., may be weaker than the other 

 organs. It is the weaker internal organ that is in the most 

 danger of suffering, when the balance of circulation is dis- 

 turbed. Several men may be exposed to a storm together, 

 and all may be drenched with rain and chilled. In all, the 

 cutaneous circulation is disturbed, and the perspiration 

 checked, the blood is thrown, inward, and some internal 

 derangement may follow. But this differs according to the 

 previous state of the constitution. One of these men takes a 

 cold in his lungs, the second is attacked with a pleurisy, the 

 third with a disorder of the digestive organs, the fourth with 

 rheumatism, the fifth has a fever, the sixth a headache, while 

 the seventh has sufficient vigor of constitution to resist the 

 internal disturbance, and to produce immediate reaction in 

 the vessels of the skin, and restoration of all its healthy 

 functions. 



492. There are many conditions of the body that affect 

 the insensible as well as the sensible perspiration. All 



