LIVING LIGHTS 



to " wireless " messages ; and the earthworm, 

 though without ears, is aware of the light tread 

 of a thrush's foot. As a particular instance of 

 the activity of life, let us take the power of giving 

 forth light. 



Luminescence 



From the point of view of chemistry and physics, 

 the living creature is a material system which 



CHR 



Luminescent or Phosphorescent cell. (After Watase.) c, General 

 substance of the cell ; CHR, Readily stainable bodies or 

 Chromosomes of the nucleus living constituents. A, Food ; 

 PH, Light -producing Granules not living constituents. 

 Oxygen acts on the granules, and Light comes from the 

 cell as the result of oxidation. 



effects the transformation of matter and energy. 



123 



