86 PLANT DISEASE 



when it is a blackish red watery blood, I have 

 noticed the chest cavity filled with it. In cases 

 where I have had diseased animals killed, and 

 found the chest cavity very full, it was notice- 

 able that very little blood came from such 

 animals, suggesting the idea that it is a dropsical 

 disease, the disintegration of the blood being 

 brought about by the fungoid growth instead 

 of being caused by extreme anaemia as in the 

 case of dropsy. 



Many farmers think there are two forms of 

 heartwater, the one I have so far described, 

 which is more or less acute, and another which 

 is protracted and shows considerable swelling 

 round the head, from which can be drawn the 

 same watery fluid. 



In these cases, as far as I know, there is no 

 heartwater, but large numbers of wire-worms 

 can be found in animals dying of it, as well as in 

 animals dying distinctly of heartwater. And 

 as authorities writing on wire-worms say they 

 produce anaemia, it is clear that heartwater 

 is connected with anaemia, and therefore with 

 an impoverished blood. 



Many farmers assert they can cure wire-worm 

 in lambs by giving them succulent food, which 



