6 The Farmer's Veterinary Adviser. 



acid is usually preferred for dung-heaps, yards and other 

 outside purposes, but is disagreeable indoors. Coal-tar 

 and wood-tar, from their contained carbolic acid and allied 

 products, are also good for out-door uses. 



The following are especially applicable to solids and 

 liquids : 



Chloride of lime sprinkled on floors, yards, dung-heaps, 

 etc., or appHed to walls, wood-work, etc., or poured into 

 draius, as a solution of ^Ib. to a gallon of water. 



Chloride of zinc is equally efficient but more expensive, 

 and cJiloride of aluminium (cJwralum) is somewhat less po- 

 tent. 



Sulphate of iron (copperas) is one of the most efficient 

 and cheapest disinfectants for drains, manure, floors, 

 yards, etc., and may be applied either in fine powder or in 

 solution. 



The sulphates of copper and zinc and perchloride of iron 

 are efficient but much more expensive. 



Saturated solutions of caustic potassa and soda are satis- 

 factory for wood-work, harness and utensils, but they are 

 useless if diluted. Lime is useful in graves by absorbing 

 the water and uniting with the organic debris, but is very 

 unsatisfactory as a general disinfectant. 



Permanganate of potassa promptly changes putrefying 

 organic matter rendering it sweet and wholesome, but it is 

 questionable how far it can destroy living organic germs 

 of which many of the contagious principles are probably 

 composed. The same remarks apply to charcoal, animal 

 and vegetable, and to earth, especially that containing a 

 considerable proportion of clay or marl. 



HOBSE-POX. 



_ This is probably identical with cow-pox, being indis- 

 tinguishable when inoculated on men or cattle. It most 

 frequently attacks the limbs, but may affect the face or 

 other parts of the body. There is usually some Httle 

 fever which, however, passes unnoticed by the owner. 



