30 INFLAMMATION. 



epizootic influence, or that it arises from that condition of blood 

 observable in purpura. These hajmorrhages must not, however, 

 be confounded with blood-staining of the part through the 

 oozing of some of the colouring matter of the blood. The 

 natural colour of the inflammatory new formations is greyish or 

 yellowish-white (straw colour very often) ; and even when they 

 contain blood-vessels, this opacity prevents their having any 

 uniform tinge of redness when they are recent. (Example — 

 Surface of lung in pleuro-pneumonia.) When they present a 

 tinge of redness, it is either because of hsemorrhage into them, 

 or because they have imbibed the dissolved colouring matter of 

 the blood (hoematodine) ; and when this imbibition happens 

 during life, or soon after death, it is important, as indicating an 

 ill-conditioned state of the blood, in which the colouring matter 

 of the corpuscles becomes unnaturally soluble. 



