ANALYSES OF MISCELLANEOUS FOOD MATERIALS. 105 



Moleschott gives the following" diet as sufficient for a man per- 

 forming a moderate amount of work- : 



Protein 120 grams. 



Fats 90 grams. 



Carbohydrates 330 grams. 



This gives a total weight of 540 grams, or about l 1-5 pounds 

 of dry matter per day. By the use of the proper factors, we find 

 that such a diet has a fuel value of 2,680 calories. That is, these 

 quantities of nutrients, in the metabolic processes which they 

 undergo in the body, yield an amount of heat' sufficient to raise 

 2,680 kilograms of water i° C, or about 5 tons of water i° F. 



It is an interesting fact that what constitutes an adequate diet 

 for the European does not satisfy the American workman. By 

 a study of dietaries in this country Atwater has found that a man 

 at moderate labor requires daily about 125 grams proteids, with 

 enough fats and carbohydrates to bring the fuel value up to 3,500 

 calories, an advance of about 30 per cent over Moleschott's esti- 

 mate. This required fuel value may be supplied by adding to 

 the 125 grams proteids, 100 grams fats, and 502 grams carbo- 

 hydrates. In the following table these European and American 

 estimates are compared. 



European. 



Grams. 



Calories. 



American. 



Grams. 



Calories. 



Protein. . . — 



Fats 



Carbohydrates 

 Total 



120 



90 

 330 



492 

 837 

 1353 



125 

 100 

 502 



512 



930 



205S 



540 



2682 



3501 



In the following tables these standards are compared with the 

 contents of the packages concerning which the previously men- 

 tioned claims are made. Since 6327 and 6328 are said to be 

 sufficient for 36 hours, two-thirds of the contents of the package 

 are taken as the basis for calculation. The emergency ration 

 6333 is said to suffice for two meals; in the table the contents are 

 therefore increased by one-half to correspond with one day of 

 three; meals. 



