28 HUMAN PHYSIOLOGY 



time of inaction. These experiments, repeated and 

 verified, clearly showed that the nitrogenous waste 

 bore no proportion whatever to the amount of 

 exercise or work performed, and that whereas the 

 non-nitrogenous waste did bear a very distinct 

 relationship to work, it became clear that the non- 

 nitrogenous foods represent the true source of 

 energy. In this way the doctrine was firmly estab- 

 lished that it is on fat, starch, and sugar, that our 

 active bodily work is performed, whilst nitrogenous 

 foods became settled in their proper place as tissue- 

 producers and repairers of the bodily waste which 

 to a certain extent is perpetually represented in our 

 frames. 



AN INTERESTING TABLE. An interesting table 

 was compiled by the late Dr. Frankland, the eminent 

 chemist, on the results of the experiments just 

 described. He calculated the quantity, the cost per 

 pound, and the actual cost of the food, which, if 

 perfectly consumed and utilised within the human 

 body, would supply it with energy enough to raise 

 a man's weight (140 pounds) 10,000 feet high. The 

 following items represent the chief particulars of the 



calculations thus made : 



Total 

 Cost. 

 8. d. 



3J 



3J 



5J 



5} 



11* 



1 Oi 



3 6i 



4 6 

 From this table it appears clear that the non- 



