HUMAN FKEDING. 



61 



Nutrients in Some Common Foods. 



131. In a pui-cha.se of ten pounds each of beef loin 



and ribs, how many pound.s more of digestible protein 



do you secure in the former than in the latter ? 



Process : Turning to table, we find beef loin contains 15.6 

 pounds protein and beef ribs 13.5 in 100 of fresh substance. 

 Loin, 15.G -I- 100 X 10 = 1.56 



Ribs, 13.5 H- 100 X 10 = 1.35 



Difference, 



.21 



Note. — We are here preserving an additional figure, since the 

 weighing is much more accurate than in the preceding chapters. 

 The last figure even here, however, has but little significance. 



132. What is the difference in amount of fat in these 

 foods when 20 pounds of each are purchased ? 



