36 DEPARTMEI^T bulletin 975, U. S. DEPT. OF AGBICtfLTUfiE. 



Chart 50. One Pound of Apple Pie. 



One pound of apple pie supplies about 2,225 calories of energy, 14 grams 

 (about i ounce) of protein, 0.01 gram of calcium, 0.05 gram of phosphorus, and 

 0.9 milligram of iron. It would furnish, therefore, 35 per cent of the energy a 

 man needs daily, 14 per cent of the protein, 3 per cent of the calcium, 4 per cent 

 of the phosphorus, and 6 per cent of the iron. This is shown in the following 

 chart : 



ENERGY 

 mOTEIN 



14m 



HHH 



H 



CALCIUM 



m 





PHOSPHORUS 



m 





IRON 



6m 



/o JO JO 4-0 iVi 6t) To 90 90 



Chaet 50. — Proportions of energy, protein, calcium, phosphorus, and iron needed per man 

 per day furnished by 1 pound of apple pie. 



USES OF THE CHARTS. 



The housekeeper or the student of foods can quickly see from the 

 charts in just what proportions the five important constituents— fuel, 

 protein, calcium, phosphorus, and iron — are supplied in 50 common 

 foods. The charts are so simply arranged that a cursory reading will 

 show these special characteristics of the various foods. For example, 

 even a glance at the chart of American cheese will show that it is 

 extremely rich in calcium. If desired, additional charts may be con- 

 structed easily for other foods by using the figures for the nutritive 

 requirements (p. 2) in relationship to the amount of energy, protein, 

 calcium, phosphorus, and iron present in the foods as reported in 

 tables showing food composition.^ 



The charts show how far a pound of any one of the foods goes 

 toward supplying the fuel, protein, calcium, phosphorus, and iron 

 needed daily by a man at moderate muscular work. The percentages 

 of these constituents supplied by fractions of a pound can easily be 

 calculated. Changes may also be made to indicate the relationship 

 of a certain quantity of food to the requirements of a family or to a 

 period of time longer than a day. 



How much of several, different foods will be needed to supply the 

 daily requirement of iron or any other element, can be found by 

 adding the percentages representing this element. 



3U. S. Dept. Agr., Office Expt. Sta. Bui. No. 

 Food Materials. 



28, Chemical Composition of American 



