IfETABOU 



inch enerj is tin 1 ease, for examph w i 



peculiar prop< if proteins accou U beating qual- 



ities. It explains why protein « -• ■ 1 1 1 1 I on of I 



pies living in cold regions, and why it I down in 1 t of 1 



who dwell near the tropics. Individuals maintained on a lo* 

 may suffer intensely from cold. 



It' we add to the basal heat production • t 1 680 ' ther 1' ■- I 



lo per '-'lit I "ii account of food, tl 



short of that which \\»- know must be Liberated when we calculate tin- 

 available energy of the diet, which \\<' may tak< a 2 C. Wnal 

 comes of the extra fuel ! The answer is that it 



Thus it has been found that if the observed ; - if lying d< 



in the calorimeter, is madi I in a chair, the heat pro 



S per cent, or if he performs such n te - would 



ordinary work (writing at a desk) it may rise 29 per cent — that - | 



90 C. per hour. There is, however, practically no diffi in the 



rv^y output of a person lying Hat or lying: in a semi-reclining j 

 tion, as in a steamer chair. Allowing eight hours for Bleep and - 

 hours for work, we can account for about 2,168 < '.. the remaining 

 ( '. that are required to bring the total to that which we know, from b1 

 tical tables of the dirts of such worfa - i be the actual daily expeni I 

 being due to the exercise of walking, [ft! 



still more calories will be expended; thus, to - I a hill of 1,( * at 



the rate of 2.7 miles an hour requires 407 extra calories. Field work 5 

 may expend, in 24 hours, almost twice as many calori - - 



in sedentary occupatio 



Standard for Comparison 



When the energy outpul per kilo body weight is determined in anin 

 of varying size, the values are greater the lighter the animal. This s 

 evidenl from the following results obtained on 



n // 



i; 



When, on the other hand, instead of body weight, t ; nir- 



fa \ the body is taken as tl ilculation, results 



constant are obtained. Following arc tin 



this bas 



