No. 4.] STABLE DISINFECTION. 375 



Creolin, lysol, disinfektol and other coal-tar products 

 which closely resemble carbolic acid in their composition and 

 action may be used for disinfection in place of the latter. 

 AVhile less caustic, irritating and poisonous, and possibly 

 slightly more active as disinfectants, they are not so easily 

 obtained as carbolic acid, and are for practical purposes but 

 little if any better. 



Corrosive sublimate (perchloride of mercury) is a very 

 poisonous, caustic and corrosive chemical, and must in all 

 cases be used with "Treat caution, to avoid fatal results. It is 

 the strongest disinfectant for practical use that we have. As 

 small a quantity as one part to forty or fifty thousand parts 

 of meat infusion will prevent the growth of bacteria in it. 

 Stronger solutions are used for disinfecting purposes, one 

 part to one thousand parts of water or one to five hundred 

 parts of water being the strength of the mixture usually 

 recommended. Approximately, sixty grains of sublimate to 

 a gallon of water or one ounce to eight gallons make a solu- 

 tion of one to one thousand parts. It should always be 

 mixed and kept in glass jars or wooden tubs, as it quickly 

 corrodes metals. The mixture should be well stirred and 

 allowed to stand for several hours, in order that the subli- 

 mate may become thoroughly dissolved. 



Never allow it to remain uncovered, where it is accessible 

 to man or animal. 



It may be applied with mop or brush, or better with spray- 

 ing apparatus, as advised for carbolic acid. When mixed 

 with dirt, especially manure, it loses its strength in propor- 

 tion to the amount of foreign substances present. For this 

 reason all dirt should be removed from the walls as thor- 

 oughly as possible by washing and scraping before the subli- 

 mate is applied. Mangers, troughs, pails, etc., that have 

 been treated with sublimate, should be carefully rinsed sev- 

 eral times before being used again. 



As carbolic acid, creolin and the other coal-tar products 

 arc less dangerous, it is better that they be used, unless the 

 use of the sublimate can be entrusted to an intelligent and 

 reliable man. 



To destroy infectious matter in the air or in those parts 

 of the stable that cannot be easily or thoroughly treated by 



