102 DAIRY LABORATORY GUIDE 



Milk Paste 



Thoroughly mix three parts of casein with one part 

 of sodium borate (borax), moisten with water and 

 test for paste. This is frequently used for library 

 paste. Mix one part of casein with one part of quick 

 lime, moisten and test for glue. 



Dried Milk 



Heat 15 pounds of skim-milk in vacuum at 165 F. 

 until it dries to a paste. Frequently turn until it 

 forms a crisp and then pulverize. 



Milk Sugar 



Rapidly coagulate skim-milk by means of rennet 

 or acetic acid. Filter whey and render slightly 

 alkaline by the addition of lime water. Evaporate to 

 about one-half bulk and precipitate albumen by 

 boiling or with small amount of alum. Remove 

 by again filtering and evaporate the second time to 

 about one-sixth of its bulk. Add equal volume of 

 methyl alcohol, and allow to stand for three to six 

 hours. A pure white, finely crystalline precipitate 

 of lactose is thrown down which is removed by filter. 

 Cool and taste. 



EXERCISE XXVII 

 JUNKET 



To 1 small junket tablet add 1 dram (1 teaspoon- 

 ful) of cold water. Crush tablet and dissolve thor- 



