PRESERVED MILK 



201 



usually hold about 450 g. (1 lb.),and this quantity is equivalent 

 to H litres (2| pints) of ordinary milk. The addition of cane 

 sugar renders the milk very durable, and it may be kept for an 

 indefinite period if the tin is not opened. Even when the tin 

 has been opened the contents will remain good for about a week, 

 and in some cases a little longer. 



Milk prepared from condensed milk to which cane sugar has 

 been added has a very sweet taste. Condensed milk is usually 

 mixed with 3-4 times its volume of water, and this mixture 

 has all the properties of ordinary milk. 



Fleischrnann, 1 who has compared a very large number of 

 analyses of condensed milk, gives the following composition to 

 the article prepared with sugar : 



Mean. 



Water 25 '686 per cent. 



Fat 10-985 



Protein 12-325 



Milk and cane sugars ... 48 '662 ,, 



Crude ash 2 -342 



Fluctuations. 

 12-4335-66 per cent. 



7-5418-78 



7-7920-14 

 41-25-53-89 



1-56- 3-87 



100-000 



The proportion between the quantities of milk sugar and of 

 cane sugar is generally : 



Mean. Fluctuations. 



Milk sugar 

 Cane sugar 



16-288 per cent. 

 32-374 



10-8218-35 per cent. 

 24-1140-48 



Condensed milk to which sugar has been added has an 

 average specific gravity of T2820 at 15 C., but it can fluctuate 

 between 1-254 and 1-4038. D. Sidersky 2 gives the following 

 average analyses of different brands of sweetened condensed 

 milk. 



1 Lehrbuch der Milchwirtschaft. Fourth edition. Leipsic, 1907, p. 398. 

 3 Rapport au II 6 Congres international de Laiterie a Paris, 1905. 



