STERILIZED UNTHICKENED MILK. 



281 



after being five to eight days in the milk, or, at ordinary tempera- 

 tures, only after a lapse of weeks or months. 



Sterilized milk, as almost universally prepared at present, is 

 only sold in glass bottles, provided with hooped iron stopcocks 

 and with a lead seal, and holding from '250 to '33 kilos, of milk. It 

 has a flavour of boiled milk; the colour is either almost unchanged 



Fig. 81. Sterilizing Apparatus. 



or is of a distinct bright yellow. It contains no soluble lime salts 

 and no soluble albumin. It is unsusceptible to the action of rennet, 

 and yields, when coagulated with acids, a fine flocculent coagulum. 

 The author, in collaboration with Dr. Aug. Morgen, showed, in 

 1883, that the nitrogenous matter in milk, which has been submitted 

 to high temperatures, is somewhat more digestible than in fresh 

 milk, a fact which has subsequently been confirmed by Raudnitz 

 and Stutzer. 



Nearly all sterilized non-thickened milk is used for children, and 

 is used without delay. Although it is easy enough to keep it for 

 weeks, it is not well suited for this, since it is very quickly sepa- 



