HUMAN FEEDING. 71 



169. How much bread and butter when used in the 

 proportion of 1 to 10? 



Important truth. Mineral salts are essential for body 

 growth and good health. They are not harmful, even 

 when taken in excess of the body's actual needs. In 

 planning dietaries, include as frequently and as exten- 

 sively as possible foods containing considerable quantities 

 of digestible ash. This is neither difficult nor costly, since 

 foods carrying this nutrient are abundant in quantity, rea- 

 sonable in price, and easily prepared. Many of these 

 foods are appetizing and high in value in the other nutri- 

 tive substances. 



