168 



AGRICULTURE. 



Dietaries and Dietary Standards. — As the outcome of 

 a great deal of observation and experiment, nearly all in 

 Europe, standards have been proposed for the amounts 

 of nutrients and energy in the daily food required by 

 different classes of people. Those of Prof. Voit, of Munich, 

 Germany, are most commonly accepted by specialists in 

 Europe. Voit's standard for a laboring man at moderately 

 hard muscular work calls for about 0.25 pound of protein 

 and quantities of carbohydrates and fats sufficient, with 

 the protein, to yield 3050 calories of energy. Taking into 

 account the more active life in the United States, and the 

 fact that well nourished people of the working classes here 

 eat more and do more work than in Europe, and in the 

 belief that ample nourishment is necessary for doing the 

 most and the best work, I have ventured to suggest a 

 standard with 0.28 pound of protein and 3500 calories of 

 energy for the man at moderate muscular work. (For list 

 of dietary standards, see p. 175.) 



Calculation of Daily Dietaries. — Due regard for health, 

 strength, and purse requires that food shall supply enough 

 protein to build tissue and enough fats and carbohydrates 

 for fuel, and that it shall not be needlessly expensive. 



On the basis of the standards for dietaries given on 

 page 175, various combinations of food materials for daily 

 dietaries may be made by calculations from the table, 

 showing percentages of nutrients, etc., in food materials 

 (p. 169). Thus if a dietary for a man at moderately hard 

 muscular work is to be made up of round beefsteak, butter, 

 potatoes, and bread, it may be calculated as follows: 



