100 HUMAN PHYSIOLOGY 



to renew daily his store of energy equal to a 

 mechanical work which would lift nearly 1 ton a 

 height of 1,094 yards. Differ as the estimates may 

 regarding man's working profit derived from his 

 food consumption, we are at least standing on sure 

 ground when we assert that the profit he exhibits as 

 a working engine, in the shape of energy, far exceeds 

 that ever likely to be developed by any of his own 

 inventions. 



