12 DEPARTMENT BULIiETIN 9*75, U. S. DEPT. OF AGE.ICTJLTUEE. 



Chart 2. One Pound of Sweet Potatoes. 



(2 large.) 



A pound of sweet potatoes supplies about 445 calories of energy, 6 grams 

 (about i ounce) of protein, 0.07 gram of calcium, 0.15 gram of phosphorus, 

 and 0.8 milligram Of iron. It would furnish, therefore, 13 per cent of the 

 energy a man needs daily, 6 per cent of the protein, 10 per cent of the calcium, 

 12 per cent of the phosphorus, and 12 per cent of the iron. This is shown in 

 the following chart: 



ENERGY 



/3%^ 



FROTBN 



m 



CMCiUM 



lom 



msFHom 



i2fjm 



IRON 



1 fO 30 30 fo JO 60 70 8p 9p 



Chart 2. — Proportions of energy, protein, calcium, phosphorus, and iron needed per man 

 per day furnished by 1 pound of sweet potatoes. 



Chart 3. One Pound of Onions. 



(4 or 5 medium-sized.) 



One pound of onions supplies about 210 calories of energy, 6 grams (about 

 i ounce) of protein, 0.14 gram of calcium, 0.18 gram of phosphorus, and 2.2 

 milligrams of iron. It would furnish, therefore, 6 per cent of the energy a 

 man needs daily, 6 per cent of the protein, 21 per cent of the calcium, 14 per 

 cent of the phosphorus, and 15 per cent of the iron. This is shown in the 

 following chart : 



ENERGY 



Gik 



PROTEIN 



om 



CMCIUM 



217mm 



FHOSFHORUS 



14-mm 



IRON 



\ Ao 3p Jfi *p Sfl tp 7p 8p 9p 



Chart 3. — Proportions of energy, protein, calcium, phosphorus, and iron needed per man 

 per day furnished by 1 pound of onions. 



