68 FARM ARITHMETIC. 



Mineral nutrients. In feeding farm animals little at- 

 tention is given the question of mineral supply, since hays, 

 roughage material, grains, and their by-products form the 

 bulk of the ration. Mineral nutrients, therefore, are fur- 

 nished in sufficient quantities. 



With man it is different. Wheat is robbed of its bran, 

 meat of its bone, eggs of their shells. These contain 

 much of the mineral salts. They are fed to live stock 



FOOD 



TOTAL NUMBER OF POUNDS IN 2000 POUNDS OF SUBSTANCE 



5 10 20 30 50 7.5 IQO 185 150 175 200 



WHOLE WHEAT 

 FLOUR 

 WHEAT BRAN 

 CORN 



CORN MEAL 

 DRIED BEET PULP 

 OATS 



OAT MEAL 

 PEAS, GARDEN 

 BEANS, GARDEN 

 BEEF 

 CHEESE 

 TIMOTHY HAY 

 RED CLOVER HAY 

 ALFALFA HAY 



MINERAL MATTER IN SOME COMMON FOODS. 



Note the small amount of mineral matter in a ton of wheat flour. Wheat bran 

 on the other hand is abundantly supplied. In our methods of manufacture, 

 farm animals profit at the expense of the human family. 



to make bone and teeth and flesh, but occur in the aver- 

 age menu in insufficient quantities for the teeth, bone and 

 flesh of children and men. 



156. A ton of wheat contains 36 pounds of mineral 

 salts, of which 27 pounds are digested when eaten. If 

 made into flour but 8 pounds of mineral salts are left 

 for human consumption, of which amount 6 pounds are 



