56 



same expenditure, or they lould have had a diet equally as nutritious 

 as the one they had for a smaller cost. 



FOOD SUPPLY IN RELATION TO BODY "WEIGHT. 



In considering the nutrients supplied b}^ a given ration and the 

 adequacy of the diet, as compared with the accepted standard, it is 

 interesting to make comparisons on the basis of nutrients supplied per 

 kilogram of body weight — that is, in rehition to the size of the subjects, 

 since it seems obvious that a very small man would not have the same 

 food requirements as a large one. It has been estimated that on an 

 average the American man weighs not far from 150 pounds (68 kilo- 

 grams). The commonly accepted dietary standard for an average man 

 at sedentar}' employment (92 grams digestible protein and 2,700 calo- 

 ries of available energ}^) would, therefore, provide 1.4 grams protein 

 and 40 calories of energy per kilogram body weight. The table below 

 shows the amounts of digestible protein and available energy fur- 

 nished per kilogram body w^eight by the dietaries reported in this 

 bulletin and compares these values with the standard selected: 



Table 15. — Daily income of digestible protein and available energy per kilogram body 



iveight. 



Subject A 



Subject B 



Subj ect C 



Subject D 



Subject E 



Subject F 



Subj ect G 



Subj ect H 



Subject I " 



SubjectK 



Average of all 



Average of all except Subject K. 

 Man with sedentary occupation. 



Average 

 weight. 



Amounts per day. 



Protein. Energy 



Kilograms. 

 50.2 

 60.7 

 66.2 

 54.5 

 62.6 

 54.9 

 66.4 

 59.3 

 53.8 

 70.4 

 59.8 

 58.6 

 68.0 



Grarris. 

 76.2 

 83.9 

 87.7 

 61.5 

 97.1 

 77.2 

 110.4 

 73.0 

 63.5 

 50.8 

 78.1 

 81.2 

 92.0 



Calories. 

 2,859 

 2,795 

 2,947 

 2,566 

 2, 712 

 2,824 

 3,336 

 2,809 

 2,506 

 1,847 

 2, 720 

 2,817 

 2,700 



I 



Amount.s per kilo- 

 gram body weight. 



Protein. Energy 



Gravis. 

 1.5 

 1.4 

 1.3 

 1.1 

 1.6 

 1.4 

 1.7 

 1.2 

 1.2 

 .7 

 1.3 

 1.4 

 1.4 



Calories. 

 57 

 46 

 45 

 47 

 43 

 61 

 50 

 47 

 47 

 21 

 45 

 48 

 40 



a This student's ration was much larger in the second and third periods than in the first. If the 

 average of the last two periods be taken as nearer normal, the income would be, per kilogram, 

 protein 1.4 grams, energy 53 calories. 



It will be seen that considering the average results for all the stu- 

 dents the food furnished 1.3 grams digestible protein and 45 calories 

 of available energy per kilogram body weight, or 7 per cent less pro- 

 tein and 12 per cent more energy than is called for by the standard 

 selected for comparison. If the results obtained with KSubject K, 

 which there is some reason for considering exceptional, are omitted, 

 the average amounts would be 1.4 grams digestible protein and 48 

 calories available energy, or as much protein and 20 per cent more 

 energy than the standard calls for. 



Considering the individual studies it will be noted that, with the 



