MODELS OF POSITIVE ION 331 



destroy surface tension also destroy phosphores- 

 cence in a gas, whilst their size will depend upon 

 the wave-length of the disturbance. An estimate 

 can be made upon this supposition of the size of 

 these molecules, and their diameter is calculated 

 to be of the same order of magnitude as the wave- 

 lengths of light in the visible spectrum, whilst the 

 building up and breaking down of these molecules 

 is nothing else than a phenomenon of physical 

 metabolism. 



