PATHOLOGY. 23 



>n the action, as the inflammation increases. The 

 pain depends much on the structure of the part ; 

 for where it is confined by horn, as in the foot, or 

 under fascia^ it is much more acute. The swelling 

 is produced by something thrown out by the ex- 

 halant arteries into the inflamed part, and which 

 is the coagulable lymph and serum. The lymph 

 coagulates, and the serum transudes into the sur- 

 rounding cellular membrane, so that where the 

 cellular membrane is loose, the swelling will be 

 greater, as it also will in a depending part. 



Inflammation may terminate in resolution^ 

 adhesion, suppuration, and gangrene ; sometimes 

 producing a disease worse than inflammation, and 

 at other times preventing a disease. When the 

 increase of action, pain, swelling, and tenson gra- 

 dually subside, without any evacuation of matter ^ 

 this is called terminating by resolution ; but this 

 cannot take place without the parts are entire, and 

 the irritating cause removed. It is necefsary to tne 

 keeping up of inflammation, that the cause should 

 be increased, otherwise the parts, becoming ac- 

 customed to the cause, will return to their natural 

 functions. This fact may be very well illustrated 

 by the friction of an horse's collar. This, before 

 the parts are accustomed to it, will produce such 

 irritation as, even to lay the parts raw ; but, after 



