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one part; sugar 37:2 parts, and mineral ash .7 of one part. 

 One pound of this burns to yield 730 calories. 



Compare this with an analysis of another common food, 

 cabbage : 



Cabbage Apple Sauce 

 Water 91.5 61.1 



Proteid 1.6 .2 



Fat .3 .8 



Carbo-hydt 5.6 37.2 



Ash 1. .7 



One pound of cabbage burned in the calorimeter only 

 yields 145 calories against 730 calories for apple sauce 

 sweetened for serving. Which, then, has more value as a 

 food? 



Cooking changes the composition of the apple in three 

 ways. Because there is present an acid — malic or apple acid 

 — the woody fibre is changed to some extent by the heat, and 

 the acid together to a sugar exactly as the manufacturer 

 makes glucose out of cornstalks or potatoes and sulphuric 

 acid. Moreover, that portion of the woody fibre which is not 

 changed, is so softened as to be more easily digested. Again, 

 sugar added for sweetening makes the resulting baked or 

 stewed apple proportionately richer as a food. 



The raw apple, by actual experiment under the super- 

 vision of Uncle Sam, is one of the most completely digested 

 of all fruits, but an apple baked without sugar is easier for 

 an invalid to assimilate because the tough fibre has been 

 softened. If baked with sugar it is not so easy of digestion. 

 Something depends also upon the ripeness of the apple. A 

 mellow sour apple was digested in two hours, a mellow sweet 

 apple in one and one-half hours. 



In this experiment the sweet apple was more quickly 

 digested, but if you have proved to your satisfaction that the 

 sour apple digests more completely and more comfortably — 

 why — ignore this data for the personal equation, though a 

 mysterious one, is too important a factor to be ignored in 

 dietics. "What is one man's meat is another man's poison," 

 may be set down as an axiom in the science of diet. 



When apples are used in pies and puddings, their nu- 

 tritive value is greatly increased, and as in apple pie and 

 cheese a well balanced food is often the result. 



It is commonly believed that these pies and puddings 



