SURVEY QUESTIONS 



What are vitamins and what do they do ? Do you know why milk is a good 

 food? Why do we eat so many different kinds of foods? What makes 

 foods cheap or expensive ? Is it true that all cheap foods are poor foods ? 

 Do you know what adulteration means ? Give an example. 



Photo by H. Armstrong Roberts 



UNIT XI 



HOW DOES MAN DETERMINE THE VALUES OF FOODS? 



Preview. Anyone reading advertisements in a magazine today 

 cannot help noticing the number of food slogans that the pro- 

 ducers of food place before the public. " An apple a day keeps 

 the doctor away/' " Take your daily orange juice," " Eat yeast 

 and get your vitamins," " Drink a quart of milk a day," etc. We 

 naturally want to know just how many of these statements are 

 true. The facts concerning what we should eat and why we should 

 eat certain foods are certainly worth knowing. 



Every one knows that the human machine needs fuel. A 

 locomotive uses coal, water, and oxygen. A living animal gets 



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