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. 
