188 GENERAL THERAPEUTICS FOR VETERINARIANS 



[quart] of calcium chloride, slowly and with continual stirring, 3 or 20 liters 

 [quarts] of water (concentrated and dilute calcium chloride solution). The 

 solution is in every case to be freshly prepared immediately before using. 



4. Dilute cresol water (2.5 per cent.^). This is prepared by adding to 

 60 CO. [12 drams] of liquor cresolis compositus sufficient water to make 1 

 liter [1 quart] and mixing thoroughly. 



5. Carbolic acid solution (about 3 per cent.). This is prepared by adding 

 to 30 c.c. [1 ounce] of liquefied carbolic acid (phenol liquefactum) sufficient 

 water to make one liter [1 quart] of disinfectant fluid, and mixing thoroughly. 



6. Cresol-sulphuric acid solution. In the preparation of the solution, 2 

 parts by volume of crude cresol are mixed at ordinary temperature with 1 

 part by volimie of crude sulphuric acid and the mixture is allowed to stand 

 for at least 24 hours. Then for each 30 c.c. [oimce] of the mixture sufficient 

 water is added to make a liter [quart] of disinfectant fluid, and thoroughly 

 mixed. The solution must be used within 3 months. 



When the solution is to be used to disinfect places in the open (coiu-t- 

 yards, stock-yards, etc.) in cold weather, sodium chloride (0.5 to 1 kilogram 

 [1.3 to 2.6 pounds] to each 10 liters [10 quarts]) may be added to prevent 

 freezing, being thoroughly mixed in by stirring. 



Stables, yards, utensils, etc., which have been cleansed with soda or soap 

 solution must be thoroughly washed with water to remove the remaining soda 

 or soap before the cresol-sulphuric acid solution is applied. 



7. Corrosive sublimate solution (l/lO per cent.) . Thissolution is prepared 

 by dissolving in each liter [quart] of water 1 gram [15 grains] of corrosive sub- 

 limate and 1 gram [15 grains] of sodium chloride with a small amount of red 

 coloring matter, or colored tablets, containing 1 gram [15 grains] of sublimate, 

 may be used. 



Stables, yards, utensils, etc., which have been cleansed with soda or 

 soap solution must be washed with water to remove any remaining soda or 

 soap before being disinfected with the sublimate solution. Disinfections in 

 which large quantities of sublimate solution are used, as the disinfection of 

 stables, yards, etc., can only be done under veterinary or police supervision. 

 In disinfecting with subhmate solution, especially in disinfecting cattle stables, 

 it is recommended that the disinfected surfaces and objects be washed after 

 24 hours with a \^ per cent, solution of sulphurated potassium. 



8. Formaldehyde solution (about 1 per cent.). This is prepared by adding 

 to each 30 c.c. [ounce] of commercial formaldehyde solution (formalin) sufficient 

 water to make 1 liter [quart] of the disinfectant solution, and mixing thoroughly. 



' In swine plague and hog cholera a 6 per cent, cresol water is used. In- 

 stead of 50 c.c. [12 drams] of liquor cresolis compositus, 120 c.c. [4 ounces] 

 are required for each liter [quart]. 



