10 INFLAMMATION. 



a side vessel into a large one, and oscillating in the current 

 without separating; but that this is produced by a viscous 

 condition of these bodies, which causes their surfaces to stick 

 together, as he appears to think, is negatived by the fact that 

 not unfrequently I have seen one or more of them approach 

 rapidly a vessel in the inflamed tissue not yet obstructed, then 

 proceed slowly, oscillate for a while, until at length, getting 

 beyond the diseased parts, it has again darted off with the same 

 velocity as it came. Again, it may frequently be observed, 

 when a vessel is so full of coloured corpuscles that they can 

 no longer be distinguished, and seem to have melted together, 

 that, on rupturing it, these bodies, when extravasated, at once 

 assume their original form, and arrange themselves just the 

 same as they do coming from a healthy structure. I cannot 

 suppose, therefore, that the cause of stasis is connected with 

 adhesiveness of the blood corpuscles ; indeed, many of the 

 valuable observations of Mr. Lister himself only confirm what 

 I have long maintained, namely, that they simply are drawn 

 together and brought more closely into contact by some external 

 force, which is excited by irritation of the surrounding tissue." 



Later experiments have to some extent confirmed the con- 

 clusions of Bennett. Dr. A. Eyneck has made some experiments 

 in the Physiological Laboratory at Gratz, upon the production 

 of stasis, and has shown that all its phenomena can be produced 

 by irritation in the webs of frogs, in which milk or defibrinated 

 blood of mammalia has been substituted for the circulating 

 fluid. If a web so treated be touched with a rod moistened 

 with ammonia, the phenomena of stasis occur in the irritated 

 part; the capillaries become crowded with milk globules, ex- 

 hibiting the appearance of grey cords. When defibrinated blood 

 is used, the results are even more striking, for in this case the 

 choked vessels soon exhibit in every respect the same appear- 

 ance as in ordinary inflammation. 



These results seem to make it perfectly clear that the local 

 changes which lead to the production of stasis must have their 

 seat either in the walls of the vessels, or in the tissues which 

 immediately surround them. To determine this more precisely, 

 Dr. Eyneck varied this experiment by filling the vessels with 

 an indifferent liquid, such as a solution of common salt of 

 proper strength, so as to remove the blood ; then subjecting their 



