82 The Farmer's Veterinary Adviser. 



Chloride of sine is equally efficient but more expensive, 

 and chloride of aluminium (ehoralum) is somewhat less 

 potent. 



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 solu- 

 tion. 



The sulphate of copper and sine &nd. perchloride of iron 

 are efficient, but much more expensive. 



Saturated solutions of caustic potassa and soda are 

 satisfactory for wood-work, harness, and utensils, but they 

 are useless if diluted. Lime is useful in graves by absorb- 

 ing 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 composed. 

 The same remarks apply to charcoal, animal and vegetable, 

 and to earth, especially that containing a considerable pro- 

 portion of clay or marl. 



