58 THIRTY CENT BREAD 



nutrients, for while highly developed processes of 

 food manufacture and efficient world-wide trans- 

 portation give us the greatest opportunities for cor- 

 rect dietetics that there has ever been, these same 

 agencies open the way to greater unwisdom and 

 abuse in dietetics than have been possible in our 

 more primitive days. The net result is an obligation 

 on our part to prepare a defence of knowledge 

 against the misfortunes of prosperity. 



"Calcium, phosphorus and iron are more likely 

 than other mineral nutrients to be lacking in human 

 dietaries. On this account especial interest attaches 

 to their occurrence in food. Calcium is especially 

 abundant in milk, and is also contained in consider- 

 able quantities in eggs, vEG^^Tables and EruiTs. 



"Phosphorus is abundant in milk, eggs, nuts, peas, 

 beans and such cereal products as contain the outer 

 seed coats (germ and bran). 



"Iron is found in largest quantities in beef, eggs, 

 beans, peas, green vegetables (especially spinach) 

 and in the outer seed coats of the cereals (germ and 

 bran). 



"The foods which are poorest in minerals are pol- 

 ished rice, pearl hominy, white flour, bolted coriv- 

 meal and other cereal foods which lack the outer 

 seed coats. 



"These foods, because of their highly digestible 

 character and lack of salts, are apt to be constipat- 

 ing. Magnesium is abundant in the cereals and is 

 not apt to be deficient in normal rations. The mag- 

 nesium salts of the outer seed coats of cereals con- 

 tribute a laxative character to foods containing 

 them. 



"Potassium is found in considerable quantities in 



