AND ITS RELATION TO ANIMAL LIFE 85 



short, while on the infected side it was lightly 

 stocked, and the herbage proportionately 

 longer. Further, when this was noticed and 

 the infected ground heavily stocked, the disease 

 was reduced to a minimum. 



How far this might be confirmed by extended 

 experiments I do not know, but even if it was 

 found infallible, it never could be of more 

 than partial value, as the mortality would be 

 too high in droughty periods. 



Another feature of the disease is that it 

 appears quite indifferent to change of climate, 

 as it is just as virulent on the sea coast with a 

 warm, moist climate as in the Karoo, where 

 it is very hot and dry in summer and cold in 

 winter. 



The internal symptoms are distinctive, the 

 one from which it takes its name being very 

 marked, namely, a serous or watery fluid 

 in the pericardium or sac surrounding the 

 heart, with a varying quantity of watery fluid 

 in the chest cavity, ranging in colour from straw 

 to blackish red. When it is a straw-coloured 

 fluid, you will frequently find a yellowish jelly 

 in the pericardium and chest cavity having 

 every appearance of serum, and in some cases 



