MILK PRODUCTS 425 
milk powder is manufactured from skim milk since cer- 
tain difficulties are encountered in preserving a product 
containing a large percentage of butter fat. 
14, Condensed milk.—Two kinds of condensed milk 
are prepared—sweetened and unsweetened. The first is 
preserved with cane sugar. In both 
forms milk is heated to about 180 de- 
grees, sterilized with steam under pres- 
sure, and evaporated until a suitable con- 
sistency is reached. Unsweetened con- 
densed milk is not usually concentrated 
to quite the same degree as the sweet- 
ened. It is used mostly in the ice cream 
trade, although to some extent for home 
use. The sweetened forms, if properly manufactured, 
will keep for months or years even and are used largely 
in bakeries, candy factories, steamships or other places 
where fresh milk is not easily obtainable. 
15. Other milk products.—Milk sugar is made by evap- 
orating to a small bulk whey, clarified by boiling and 
treatment with alum or other substances. Buttermilk, 
which so recently was largely used as a food for pigs and 
poultry, is now a fixed product of human dietaries. The 
lactic organisms in milk are utilized ia the preparation 
of various milk drinks which are sold under various 
names, according to the particular organism used to turn 
the milk sour. Some medical authorities claim that the 
lactic milk preparations are healthful and tend to prolong 
human life. < 
CANNED! 
