DISINFECTANTS 567 



Giaxa, in a similar line of work to that of Jaeger's, found 

 that in the disinfection of walls even a five per cent lime wash 

 acting forty-eight hours failed to destroy anthrax spores, the 

 bacterium of tuberculosis and the bacillus of tetanus. 



A strong solution of the chloride of lime may be classed 

 as one of the rapidly acting disinfectants for most bacteria, but 

 Jaeger's report of its failure when applied to the infection ot 

 tuberculosis and glanders should be borne in mind. For the 

 cleansing of cattle cars Gruber advises scrubbing them out 

 with hot water or washing with a two per cent solution of soda 

 at 50° C. , although this has no particular disinfecting power. 

 If the cars are infected he sprays with a 5 to 10 per cent solu- 

 tion of formaldehyde. 



^ 454. Disinfectants of value in the practical disin- 

 fection of stables and pens. For disinfecting pens, stable 

 floors and the like the following solutions have been recom- 

 mended and their careful and intelligent use has shown them 

 to be very efficacions. 



1. Corrosive sublimate (^mercuric chloride), i ounce in 8 

 gallons of water (^one-tenth of i per cent). The water should be 

 put into wooden tubs or barrels and the powdered sublimate 

 added to it. The whole must be allowed to stand for twenty- 

 four hours, so as to give the sublimate an opportunity to 

 become entirely dissolved. Since this solution is poisonous, 

 it should be kept covered and well guarded. It may be applied 

 with a broom or mop and should be used freely on all wood- 

 work. Since it loses its virtue in proportion to the amount 

 of dirt present, all manure and other dirt should be iirst removed 

 before applying the disinfectant. The manure should be cov- 

 ered with lime or burned. Its very poisonous nature for man 

 and animals renders it less desirable for general use than some 

 other solutions. 



2. Carbolic acid. A 5 per cent solution of carbolic acid 

 is one of the best disinfectants for mangers, feed boxes and 

 fixed watering basins. It should be applied in quantity suffi- 

 cient to thoroughly wet all parts and soak deep into the cracks 

 and crevices if there are any. 



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