DISINFECTION AND STERILIZATION. 195 



the milk to a temperature of 70 C. for fifteen minutes 

 or 80 C. for twelve minutes will accomplish this. 

 One of the many forms of apparatus is the following: 



(a) A tin pail or pot, about ten inches deep by nine 

 inches in diameter, provided with the ordinary tin 

 cover, which has been perforated with eight holes, each 

 an inch in diameter. 



(6) A wire basket, with eight nursing bottles (as sold 

 in the shops for this purpose). 



(c) Rubber corks for the bottles and a bristle brush 

 for cleaning them. 



Directions (Koplik). Place the milk, pure or diluted 

 (as the doctor may direct), in the nursing-bottles and 

 place the latter in the wire basket. Put only sufficient 

 milk for one nursing in each bottle. Do not cork the 

 bottles at first. 



Having previously poured about two inches of water 

 in the tin pail or pot and brought it to the boiling- 

 point, lower the basket of nursing bottles slowly into 

 the pot. Do not allow the bottles to touch the water 

 or they will crack. Put on the perforated cover and 

 let the steaming continue for ten minutes; then remove 

 the cover and firmly cork each bottle. After replacing 

 the cover, allow the steaming to continue for fifteen 

 minutes. The steam must be allowed to escape freely 

 or the temperature will rise too high. 



The process of sterilization is now completed. Place 

 the basket of bottles in a cool, dark place or in an ice- 

 chest. The bottles must not be opened until just before 

 the milk is to be used, and then it may be warmed by 

 plunging the bottle in warm water. If properly 

 prepared the milk will taste but little like boiled 

 milk. 



