ON THE ANTISEPTIC SYSTEM 



97 



nature of the change which Hgatures of animal tissue experience under antiseptic 

 management, could hardly have been selected. 



Between the parts tied the calibre of the artery was occupied by adherent 

 coagulum, which was for the most part decolourized, and exhibited under the 

 microscope fibro-plastic cells of irregular forms. A similar clot was present 

 between the distal ligature and a small branch that arose about a quarter of 

 an inch beyond it. But between the proximal hgature and the heart the forma- 



FiG. 3. — Some of the elements of the fibro-plastic structure of the 

 organized peritoneal ligature at the knot F. From a camera-lucida sketch. 

 Magnified 500 diameters. 



tion of a coagulum had been entirely prevented by a large vessel taking origin 

 immediately above the part tied, which had thus borne for a month the full 

 brunt of the cardiac impulse. Yet the vessel, so far from showing an\' sign of 

 giving way, as it would inevitably have done had it been tied in such a situation 

 without antiseptic precautions, appeared to have derived additional stren^^th 

 from the operation. The encircling ring of new tissue incorporated with the 

 arterial wall must have had a corroborative effect ; and within its grasp the 

 inner coats, which seemed to have been but imperfectly ruptured by the soft 

 and substantiLil ligature, were considerably thickened, and had coalesced so 



LISTER II 



H 



