THE LIVING ORGANISM 225 



own peculiar set of phenomena. No energy 

 exchanges or natural phenomena could exist 

 were there not different inorganic types 

 of energy. For all those changes which 

 affect our senses or our instruments are 

 due to energy transformations from one 

 energy form to another. The words, heat, 

 light, magnetism, electricity, and those terms 

 designating the various forms of radio- 

 activity possess a meaning although all 

 related and all manifestations of physics 

 and chemistry. Electrons, atoms, molecules, 

 colloids, cells are different things, though 

 related to one another. The chemical elements 

 must be recognised as existent — although 

 transmutable. Some term is obviously 

 required applicable to the entirely peculiar 

 set of energy phenomena witnessed in 

 living matter, such as bioiic energy. Heat 

 energy and electrical energy are mutually 

 transmutable one into the other, yet it is 

 not said that electrical energy is heat or light 

 because these appear when it is transformed. 

 Why, then, should a form of energy such as 

 inhabits living structures be thought to be 

 only a mixture of heat and electricity and 

 chemical energy, because these are obsen 

 when it manifests itself ? The position which 

 denies the existence of a form of energy 



