406 INTEENAL PAKASITES. 



eggs, and thus prevent the distribution of the disease, as well as 

 the continuance of it in an already infected area." 



If the land on which the affected horses are grazed is under 

 suspicion, lime and salt may be freely used. If it be not convenient 

 to break up the pasture (which is always the best plan), we may 

 dress it about November with, say, 4 tons of quicklime to the 

 acre. It will then be ready for stock to graze on it by the follow- 

 ing March. Or we may dress it with half a ton of salt to the 

 acre. Here, the amount of lime in the soil will be our best guide. 

 " Salt, though not a direct plant food, has a most important 

 indirect effect upon the potash, lime, and magnesia in the soil, 

 effecting their decomposition, and rendering them in an available 

 condition to be taken up by roots. In other words, salt acts as 

 a purveyor to the plants. As regards lime, nothing need be said 

 more than that it is well known, namely, that it is a direct plant 

 food, and indirectly it acts in many important ways, neutralising 

 poisonous acids, and bringing about the decomposition of organic 

 matter, etc." (" The Field "). After liming, salting, and, if 

 possible, draining the affected land, horses should be kept off it 

 for at least a year. 



