FERMENTATION 263 



Red corpuscles escape from the capillaries. 

 Hand in hand with the extravasation of cor- 

 puscles, there is an increased transudation of 

 lymph. The tissue swells with lymph, which 

 soon exudes upon the free surface of the mes- 

 entery, where it clots. The surface is then 

 covered with a fibrinous membrane, crowded 

 with white corpuscles, and containing also some 

 red corpuscles. 1 



2. Place on the frog's tongue a small drop of 

 croton oil mixed with fifty times its volume of 

 olive oil. After thirty seconds wipe off the 

 croton oil. Observe the inflammatory process 

 under the microscope. 



3. Place a rubber band around the base of a 

 white rabbit-ear and thus interrupt the venous 

 flow. Hold the tip of the ear in warm water 

 until it has a temperature of about 44 C. 

 Take the ear from the water and remove the 

 baud. 



Note the rosy swelling (oedema with slight 

 extravasation of blood-corpuscles) in the in- 

 flamed area. 2 



1 COHNHEIM: Allgemeine Pathologie, 1882, i, pp. 237-241. 



2 Id. : Loc. tit., pp. 244-245. 



