PERSONAL APPEARANCES IN HEALTH AND DISEASE. 4$ 



painful swellings sometimes form at the back of the wrist 

 from enlargement of similar sacs, which occur here in 

 connection with the cords or tendons passing over the 

 bones from the muscles which mar the ringers. 



CHAPTER IV. 



CHANGES IN ORGANS. 



WE now come to a very important part of the subject, the 

 organs of the body, and the influence their various struc- 

 tural changes exert upon external parts. It will be well to 

 pass with brevity over the natural disposition of the viscera, 

 so that we may the more readily appreciate these facts. 



The brain which is contained within the cavity of the 

 skull is not closely applied to the sides of the cavity, 

 but is invested with certain membranes, one thin and 

 full of blood-vessels closely applied over the whole surface 

 of the brain, the other dense and tough, lines the interior 

 of the skull, but is not in actual contact with the brain. 

 For the smooth outer surface of the one membrane 

 and the smooth inner surface of the other are separated 

 by a small quantity of fluid, and although here and there 

 as age advances the virtual cavity winch exists between 

 the two membranes may become obliterated by the 

 adhesion of the membranes, yet there is seldom complete 

 blending unless from disease. 



