THE HYGIENE OF THE DINING ROOM 



69 



in this respect. The edible portion contains a larger per 

 cent of protein and fats than meats and cereals contain. 



Milk. Milk is one of the very best of all our foods. For 

 children it is almost a necessity. It is well-balanced in the 

 proportions of nutrients that it contains as is shown in the 

 table given below. Milk serves all three purposes of foods. 

 It furnishes energy at a moderate price in comparison with 

 other foods ; it is a cheap source of protein ; and it is one of 

 the most important sources of those substances called 

 vitamines, which are so essential in regulating the body 

 activities. It is the richest of all the common foods in lime, 

 a substance necessary to build bones. 



In these times when so much stress is being laid on the 

 economical use of foods, special attention is called to the fact 

 that skimmed milk is almost as good a food as whole milk. 

 Reference to the table given below shows that the chief 

 difference is that the skimmed milk contains less fat, but the 

 proportions of the other nutrients are the same. Skimmed 

 milk is sold at such a low price that it is one of the cheapest 

 foods. 



LABORATORY EXERCISE 10 



Purpose. To compare foods as regards their nutritive 

 value. 



Directions. Answer the following questions from the study 

 of the table given on page 71. 



i. Which foods contain the larger per cent of proteins, 

 animal or vegetable foods ? Which of carbohydrates ? Which 

 of fats ? 



