260 [Recess, 



sanguinis from the points A and B (fig. 3), with subsequent altera- 

 tion of both the colour and disposition of the corpuscles. Fig. 5 also 

 shows the progressive resolution of homogeneous stasis in a capillary 

 vessel. 



November 1 4th, 1861 . I took a vigorous frog, and having observed 

 that the circulation was healthy, placed a ligature around a limb. 

 Qn again observing I found the circulation arrested, but the corpuscles 

 were very distinctly seen with ^-inch power, and floated about with 

 facility when the web was touched. I now applied to the web a 

 small drop of chloroform, and, on again looking, found many of the 

 capillaries had assumed the homogeneous condition. These observa- 

 tions strongly impressed me with the view that homogeneous stasis 

 depends upon a new condition of the corpuscles, and not upon their 

 crowding. The cause of homogeneous stasis appears to be the with- 

 drawal of fluid from the capillaries, leading to a local modification of 

 the liquor sanguinis, and consequently to the cohesion of the cor- 

 puscles with each other and the walls of the vessels, in obedience to 

 the principles explained in my paper " On the Causes of various 

 Phenomena of Attraction and Adhesion, as exhibited in Solid Bodies, 

 Films, Vesicles, Liquid Globules, and Blood-corpuscles," in the pre- 

 sent Number of the ' Proceedings.' 



It is true that homogeneous stasis may occur in vessels previously 

 packed with corpuscles, and we then find that the homogeneously 

 solidified portion is of a much redder colour than when it occurs 

 in a part previously free ; in both cases irritation is essential to its 

 production. 



Again, corpuscular packing may arise as a secondary effect in 

 consequence of the obstruction of the current by homogeneous stasis, 

 the heart-force being unimpaired. 



If the plug be pressed out of the cut extremity of a vessel obstructed 

 by homogeneous stasis, we find the corpuscles adherent to each other ; 

 some have burst ; we find also free nuclei. 



In homogeneous stasis a certain quantity of colouring matter 

 escapes from the corpuscles, and probably contributes to the appear- 

 ance of homogeneity. 



Stasis generally occurs first at the venous radicles, because here 

 the vis a tergo is weaker. 



Having attributed inflammatory stasis to a modification of the 



