REPARATORY INFLAMMATION IN ARTERIES. 19 



even more radical ground with respect to the Cohnheim theory 

 than the celebrated autlior thereof himself takes. 



These are the exact words : " All young cells which in in- 

 flammation are found abnormally in the tissues are wandering 

 white corpuscles.''^ Himself replying to the questions above 

 propounded, the Vienna Professor makes use of the following 

 unequivocal language : " After having abandoned the idea of 

 proliferation of stable tissue cells in inflammation, we can no 

 longer talk of the proliferation of the intima in the old sense." 

 And again : " I have no doubt that the}' originate from the 

 white blood-cells, which have been partly inclosed in the 

 thrombus, and partly may have wandered into it, according to 

 the observations of Yon Recklinghausen and Bubnofl'." As 

 to the ultimate origin of the wandering cells Billroth conceives 

 their factories to be the lymph glands, and remotely the stable 

 cells of the connective tissne. 



The great German pathologist Rindfleiseh in the main ac- 

 cords with Billroth respecting the formation and organization 

 of the throrabns in a ligated vessel. 



Tliey agree that it is formed suddenl}-, and that it is un- 

 stratified, there being no accumulation of numbefs of white 

 cells in places ; it is homogeneous throughout. 



They also agree that the blood-clot is organized ; that the 

 white corpuscles (wandering cells) are the organizing elements ; 

 that the red disks slowly degenerate and disappear. 



Rindfleiseh believes that the thrombus is largest immediately 

 after coagulation, which takes place almost immediately after 

 the blood is placed out of circulation l)y the constriction of the 

 ligature; and in this also accords with Billroth. 



Both authors think that tlie clot becomes gradually converted 

 into ordinary cicatricial tissue, and that through the cavernous 

 metamorphosis of this the clot and the vessel-wall surrounding 

 it are at length converted into a mere cord or thin band of 



