Fermentations of Milk. Ill 



Carbolic acid and cresol compounds. These sub- 

 stances are among the cheapest and best disinfectants, 

 but their use in the dairy is not advisable, on account of 

 the penetrating and lasting odor. They can be used to 

 advantage on the farm. Some of the proprietary com- 

 pounds, as Zenoleum, Kresol, etc., are easily applied, 

 since they mix readily with water in all proportions, 

 forming a milky-white emulsion that can be easily ap- 

 plied. They are less caustic and less poisonous than 

 carbolic acid. 



Corrosive sublimate. Corrosive sublimate is the most 

 efficient disinfectant under ordinary conditions. It is 

 such an intense poison that it must be used with caution 

 in places to which stock have access, or in the dairy. A 

 solution of one part of the salt to a thousand parts of 

 water (half ounce to 4 gallons of water) is the standard 

 generally used. 



For gutters, drains, and waste pipes in factories, fer- 

 rous sulphate (green vitriol), and copper sulphate (blue 

 vitriol), can be used to advantage. They are to be 

 classed as deodorants rather than as true disinfectants. 

 Since they have no odor of their own, they can be used 

 in any amount in the dairy. 



Sulphur can be used to advantage in the destruction 

 of mold spores in cheese rooms, but the effect of the 

 vapors of burning sulphur on germ . life is relatively 

 slight, unless there is an abundant supply of moisture in 

 the air of the enclosed space, in which case sulphurous 

 acid is formed which has a much greater effect. To have 

 the desired effect sulphur should be burned at the rate 

 of three pounds to each one thousand cubic feet of space, 

 and the room kept sealed for at least twelve hours. If 

 the sulphur is placed in an iron kettle which is set in a 



