BOVINE TUBERCULOSIS. 549 



wooden tubs or barrels and the sublimate added to it. The whole must 

 be allowed to stand twenty-four hours, so as to give the sublimate an 

 opportunity to become entirely dissolved. Since this solution is 

 poisonous, it should be kept well covered and guarded. It may be 

 applied with a broom or mop and used freely in all parts of the stable. 

 Since it loses its virtue in proportion to the amount of dirt present, all 

 manure and other dirt should be first removed and the stables well 

 cleaned before applying the disinfectant. After it has been applied, 

 the stable should be kept vacant as long as possible. Before animals 

 are allowed to return, it is best to flush those parts which the animals 

 may reach with their tongues, to remove any remaining poison. 



{&) Chloride of lime, 5 ounces to a gallon of water (4 per cent). This 

 should be applied in the same way. 



(c) The following disinfectant is very serviceable. It is not so 

 dangerous as mercuric chloride, but is quite corrosive, and care should 

 be taken to protect the eyes and hands from accidental splashing: 



Crude carbolic acid -i gallon. 



Crude sulphuric acid -J- gallon. 



These two substances should be mixed in tubs or glass vessels. The 

 sulphuric acid is very slowly added to the carbolic acid. During the 

 mixing a large amount of heat is developed. The disinfecting power 

 of the mixture is heightened if the amount of heat is kept down by 

 placing the tub or glass demijohn containing the carbolic acid in cold 

 water while the sulphuric acid is being added. The resulting mixture 

 is added to water in the ratio of i to 20. One gallon of mixed acids 

 will furnish twenty gallons of a strongly disinfectant solution having a 

 slightly milky appearance. 



((f) Whitewash is not of itself of sufficient strength to destroy tuber- 

 cle bacilli, but by imprisoning and incrusting them on the walls of 

 stables they are made harmless by prolonged drying. Whitewashing 

 should be preceded by thorough cleaning. 



The removal of virus from the stables should, furthermore, be pro- 

 moted by the regular removal of manure and by abundant ventilation. 

 Good air has the effect of diluting infected air, and thereby reducing 

 the chance of inhaling dried, floating tubercle bacilli, or at least of 

 reducing the number inhaled. It likewise improves the vigor of the 

 confined animals, arid hence increases the resistance to infection. 



