DAIRYING 



n 



steam is not available this can, with its bottles, may be heated 

 by means of hot water, which should not be filled above the top 

 of the bottles inside. 



3. An Incubator. (Plate 3.) This is simply a box in 

 which a fairly uniform temperature may be kept by providing 

 walls, bottom and cover filled with felt, paper, hay or any in- 

 sulating materials, and is used in the same way as a fireless 

 cooker in the kitchen. The pail is filled with warm water and 

 when the cover is closed the bottles are kept at a temperature 

 which hastens the souring of the milk, and they are protected 

 from changes of the outside temperature. It may be necessary 



Plate 3 An Insulated Box for Incubating Starters. 



to change the water in the pail occasionally, but water at a 

 temperature of about 90 degrees Fahrenheit will hold a tem- 

 perature of about 70 degrees Fahrenheit in the box for several 

 hours. 



535. The clean milk bottle, tumbler and spoon must be 

 sterilized by dipping in hot water just before using them; each 



