58 



The particular interest in tlie data summarized in the table above, 

 however, is in the comparison between the results of the studies with 

 individuals and those of the corresponding studies with groups dur- 

 ing the same period. 



While the men were chopping and yarding the quantity of protein 

 in the diet of the three individuals ranged from 175 to 213 grams per 

 man per day, and averaged 198 grams, whereas the average for the 

 group in the dietary study (No. 393) made at the same time was 176 

 grams. On the other hand, the quantity of energy per man per day 

 ranged from 5,710 to 6,780 calories, and averaged for the tliree men 

 6,415 calories, as compared with 8,085 calories for the group. Thus 

 while each of the three individuals consumed as much or more protein 

 than the average for tlie group, they obtained considerably less energy, 

 because of the smaller amount of fats and carbohydrates eaten. The 

 quantity of fat ranged with the individuals from 226 to 248 grams, 

 and averaged 239 gi-ams, and the carbohydrates from 708 to 927 

 grams, and averaged 797 grams, whereas in the average food consump- 

 tion for the group the amounts were 388 grams of fat and 982 grams of 

 carbohydrates. 



In the studies made at the time of drawing logs to the landing the 

 quantity of protein in the food eaten by the individuals ranged from 

 147 to 175 grams and averaged 159 grams, whereas the amount per 

 man per day for the group in the dietary study (No. 394) made at the 

 same time was 180 grams. As regards energy, the range for the studies 

 with individuals was from 4,665 to 6,075 calories, and the average 

 5,355 calories, as compared with 6,836 calories per man per da}^ for 

 the group. In this case eacli of the three individuals ate less protein 

 than the average for the group. They also ate much smaller quanti- 

 ties of fat. As regards carbohydrates, one man ate considerably less, 

 one only a little less, and one considerably more than was found in 

 the average for the group. 



The reason for these discrepancies between results of dietary studies 

 with groups and those with individuals under the same circumstances 

 is not easy to determine. As already noted, the subjects of the diges- 

 tion experiments were selected because they were believed to be typical 

 of the men in the dietary studies. They ate iu the same room and at 

 the same time with the rest of the crew, although at a separate table, 

 and were served wiih the same kind of food, being allowed to select 

 such kinds and amounts as their appetites dictated. If other men 

 had been chosen for the digestion experiments it is possible tliat the 

 agreement with the average results of the dietary studies would have 

 been closer; but, of course, this is a matter of conjecture only. The 

 discrepancies noted would suggest the question as to which results 

 should be considered most representative of the normal food con- 

 sumption of the men under the conditions of these investigations. It 



