HUMAN FEEDING. 69 



digested. Wliat is the percentage of digestible mineral 

 salts removed from wheat by the process of manufacture? 



157. A farmer grows ten acres of wheat which pro- 

 duces 25 bushels an acre. This wheat analyzes 1.8 

 pounds of mineral salts to each 100 pounds. How many 

 pounds of mineral salts are produced in the entire crop? 



158. If this wheat is eaten, 75 per cent of the mineral 

 salts will be digested. How many pounds will be digested ? 



Water 121*% \ / Water 9?'.<>% 



T!»ue.build,n5M.t.r;al \ / -n^ue.bu.M.ng Material \ / l^G^a.)eFl..r &%% 



l«*^«% \ / ""*''° \ / Bakers Flour »%,% 



Energy-giving Material i 1 Fnergy-^iwing Mat(?rial 



and Fider / I and Fiber / \ Patent Flour 



70Vio% / \ HH% I \ 57■^S% 



Ash H r. \ / Ash \%ia% \ /Swtj.ScreeninfcWiste 6'S ' 

 Fat 2 % \ / Fat Z'/s% ' ' 



Bran r7»/(o% 



Baker's OP Family Flour Graham or True Whole Different Products 



Wheat Flour Derived from Mtl'rrvg Wheat 



Different Kinds of Flour Comparkd. 



It will be observed that much of the ash materials is removed in the milling 



process. 



159. If this wheat, 30 per cent of which is bran and 

 other by-products, is manufactured into flour, what quan- 

 tity of flour is made? 



160. In 100 pounds of wheat flour there are 0.6 

 pounds of mineral salts. How many pounds of mineral 

 salts are there in this above quantity of flour? 



161. If of this quantity of mineral salts 75 per cent is 

 digested, how many pounds are digested ? 



162. What is the difference in number of pounds of 

 mineral salts produced from 10 acres of wheat, each acre 



