112 



THE USES OF FOODS 



digested than starch. The browning of the bread crust is 

 due to this change. 



Fireless cooker. In these days nearly every household 

 is provided with a labor-saving device known as the tireless 

 cooker. An interesting home project would be the manu- 

 facture of such a cooker. The principle of the tireless cooker 



is that of insulation. 



'' The food to be 



cooked is placed hot 

 in the metal con- 

 tainer inclosed in a 

 box with heat insu- 

 lating material filling 

 the space between it 

 and the outer part 

 of the box, while a 

 hot soapstone or 

 cast iron radiator 

 is placed under the container. In this way after the 

 covers are tightly fastened, the food cooks slowly, and its 

 flavor is preserved. In addition to this time and fuel are 

 saved. 



Scoring my foods and dietary. Probably no score card 

 is more difficult for you to use than this one and yet none 

 is more important. If you can make this a summary of 

 what you have learned about the uses of foods and then 

 apply this knowledge in your daily life your time will have 

 been well spent. In this card you will doubtless find im- 

 portant matters that have not been touched. If you want 

 to add or subtract or change any part of the card do so and 

 have the class discuss the change with you, for in this way 

 you may do some real constructive work in science. 



Fireless cooker. 



