57 



were made at the same time as dietary study No. 393— while the men 

 were engaged in cutting and yarding logs. Digestion experiments 

 Nos. 466 to 468 were made at the same time as dietary study No. 394 — 

 while the men were at work drawing logs from the yard to the land- 

 ing. The quantity of nuti-ients and energy in the food eaten per man 

 per day during the digestion experiments and the corresponding diet- 

 ary studies are shown in Table 29, which follows. For convenience 

 in tabulating the records, the digestion experiments are here num- 

 bered as dietary studies in series with the other dietary studies. 



Table 29.— Comparison of nutrients and energy of dailt/ diet in digestion exper- 

 iments and dietary studies with Maine lumbermen. . 



In the discussion of the results of dietary studies with the lumber 

 crews as a whole, it was pointed out (p. 31) that the food consump- 

 tion was larger during the period of severe work of chopping and 

 yarding than during the period of less severe work of hauling logs to 

 the landing. The same is also true for the individuals included in 

 the digestion experiments. Thus it will be seen from the figures 

 above that the minimum for the three subjects of studies during the 

 period of harder work, 175 grams of protein and 5,710 calories of 

 energy, was equal in protein, but a little lower in energy than the 

 maximum, 175 grams and 6,075 calories, daring the period of less 

 severe work. The average consumption for the three subjects in the 

 former period was 198 grams of protein and 6,415 calories of energy, 

 as compared with 159 grams and 5,355 calories for the three subjects 

 during the latter period. 



