358 BELL SYSTEM TECHNICAL JOURNAL 



the two which is known by the name of heat. Changelessness has ceased 

 to be the quahty of the atom, remaining that of the mass and the energy 

 of the world as a whole. Immortality has gone from the atom back into the 

 continuum. This is as good a place as any to step out from the incessant 

 alternation, never yet ended and probably endless, between the particle 

 and the continuum as the basis of thought about physics. 



