ON THE PATHOLOGICAL MORPHOLOGY OF SOME ANIMAL FLUIDS. 271 



on account of the greater quantity of blood with which the dilated ves- 

 sels are filled, and on account of the more manifest retardation the 

 greater quantity of the liquor sanguinis transudes. This divides into 

 serum and plastic lymph ; the latter divides again into soft fibrils and 

 the smallest molecules, which unite by attraction, and form globules, 

 which are enclosed among the fibrils. The texture thus appearing red, 

 on account of the dilatation of the smallest vessels, indurated and tumid 

 from the great exudation and the larger quantity of blood in it, more 

 hot from the rapid decomposition of the liquor sanguinis, and the quick 

 transition of the fluid liquor into solid substance, painful from the com- 

 pression of the adjacent nerves, is said to be inflamed. 



The liquor sanguinis is deposited around the attenuated parietes of 

 the vessels ; that part of the parietes of the intermediate vessels next 

 the wound is more quickly and extensively dilated than the other part of 

 the wall of the vessels, which is as yet joined to, or in contact with, the 

 adjacent texture. On this account the transudation of the liquor san- 

 guinis is more easy and more copious in that free part of the wall to 

 which no texture is opposed than in the other. 



The more copious liquor transuding on the free surface from the 

 vessels, even so as to fill the interstices of the texture, divides into 

 serum and plastic lymph ; the plastic lymph again forms soft fibrils, 

 which adhere firmly, like glue, to the parietes, and the smallest mole- 

 cules, which, in obedience to a physical attraction, form globules united 

 with the serum ; these two constituent parts form yellowish- white, 

 yellowish-green white, limpid or turbid, thick or thin fluid, called at 

 one time purulent fluid, at another puriform serum, purulent serum or 

 pus. 



The accumulated soft fibrils intermixed here and there with globules 

 of pus, constitute the coagulating lymph or cement^ (vernix) of sur- 

 geons, by which the lips of a clean, recent wound are agglutinated to- 

 gether. What has been said concerning an open, suppurating surface, 

 may be said of a shut suppurating surface, or an abscess. 



The more the parietes of the minute vessels are extended, the more 

 porous they become ; by the continual transuding liquor, the pores be- 

 come sensibly dilated ; and where the fibrils of exudation shall have 

 increased into the form of granulation, the liquor provides little rivulets 

 for itself, which, from the liquor continually transuding, are sensibly 

 rendered so large as to allow a globule of blood to permeate them ; but 

 when they decussate among themselves, the globule is easily repelled 

 again into the mass of the blood, and in such way new intermediate 

 capillary vessels are formed between the recently formed fibrils. 



