74 ANATOMY OF THE LYMPHATIC SYSTEM. 



fascicular spaces covered on one side only by a spindle-shaped granular 

 cell, that is by a flat-cell seen in profile ; in other places the latter 

 was seen to extend through the middle of the space. Besides these 

 there were also spaces whose cells were seen from*the surface pro- 

 vided with a number of processes. 



In many of the spaces there were found migratory cells in addi- 

 tion to the branched cells ; and on one preparation I have observed 

 a migratory cell migrating freely out of such a lymph lacuna into a 

 neighbouring lymphatic vessel widely dilated and easily recognisable 

 by its endothelium. 



In mesenteries only a little swollen by redepia the appearance of 

 the dilated lymph-canalicular system could befix^d very easily by 

 silver, by first pencilling the membrane carefulrjpfi one side, andthen 

 pouring the silver solution over this surface in situ ; after* having* 

 been washed with water, the omentum was kept in situ until the 

 yellow-brown colour appeared. * * 



The examination of the cedematous omentum proved of great 

 value for judging of the normal relations, especiallj^hose of Hre 

 peri-lymphangial nodules and the fat-tissue. In the former, one may 

 very easily recognise the network of branched cells which form the 

 matrix of the nodule ; farther, that this stands in direct continuity 

 with the wall of a lymphatic vessel which exists on the border of the 

 nodule, and is widely dilated. The endo-lymphangial nodules are 

 also easily recognisable, their lymphatic vessel, viz. the lymphatic 

 vessel in which they lie, being dilated by the presence of oedematous 

 fluid. 



We now turn to the question whether the lymph-canalicular 

 cells exhibit any alteration in acute inflammation, and if so, what 

 that change is. 



I have had the opportunity on several occasions of examining the 

 centrum tendineum of rabbits after forty-eight hours, in which 

 peritonitis had been set up by the injection of several minims of 

 dilute ammonia into the abdominal cavity ; and on whose centrum 

 tendineum the endothelium of the abdominal surface had quite 

 disappeared over tracts of various size. These were simply treated 

 vritli silver. The lymph-canalicular system of the abdominal serosa 



