336 THE DAIKYMAX'S 3rAXUAL. 



witli dry sawdust, or a new and most excellent material 

 known as mineral wool, which is made of furnace slag 

 blown by a blast into fine threads. These cold storage 

 houses are now in frequent use by fruit growers, butchers, 

 brewers, and poultrymen, as well as dairymen, and are 

 extremely useful. 



CHAPTER XXIY. 



CHEESE MAKING. 



The manufacture of cheese is one of the most im- 

 portant industries connected with the preparation of hu- 

 man food from a raw material. Milk is a complete food. 

 That is, it contains every chemical element required for 

 the perfect nutrition of an animal. It has the fat and 

 sugar needed for combustion in the lungs to support the 

 animal heat and the respiratory process, the caseine to 

 make flesh, and the salts to furnish material for the 

 bones. And cheese is the most convenient permanent 

 form in which milk can be preserved for consumption. 

 It contains the caseine or nitrogenous part of the milk 

 and the fat, leaving only the sugar and the mineral salts in 

 the whey which escapes. These elements are most easily 

 made up or substituted in the form of bread, and hence 

 bread and cheese make the most nutritious food for 

 its weight that can be produced. Cheese is composed of 

 varying proportions of caseine, fat, w^ater, milk acid and 

 some other extractive matters and mineral salts, chiefly 

 the salt used in its manufacture, as follows : 



COMPOSITION OF CHEESE. 



