1 1 7 8 OBSTRUCTION OF 



demonstrated in a very simple manner. If the dried 

 residue of the fever blood be extracted with boiling 

 distilled water, it will be found that the proportion of 

 matter dissolved out from the fever blood is much 

 larger than that obtained from the healthy blood 

 residue. Three specimens of blood taken from animals 

 which died of the Cattle Plague, contained respec- 

 tively, 2-91, 2'22, and r8i parts of soluble matter 

 dissolved out by boiling water, or twice the quantity 

 extracted from healthy ox blood. The exact amounts 

 were as follows : 



Blood from Cattle 

 Healthy ox blood. Plague. 



I. 2. I. 2. 3. 



Solid matter obtained ) 



by evaporating 100 / 19*87 20-63 23-1 22*78 24-88 



parts of blood ) 



Substances soluble in \ g 



boiling water j * & 



The solid matter of the two healthy specimens con- 

 tained respectively 6'6g and 5*38 per cent, of matters 

 soluble in boiling water, while the diseased specimens 

 contained respectively 12-62, 972, and 7'22 per cent. 

 So that not only is the percentage of the solid matters 

 generally greatly increased in this form of fever, but 

 the extractives and other substances soluble in boiling 

 water are present in increased proportion. These 

 substances probably constitute a pabulum, which is 

 very readily appropriated by degraded forms of 

 bioplasm. 



Obstruction of the Capillary Circulation. In all 



