{HEAD ~ A difference} in alkali metal vapor pressure on the opposite sides of electrolyte tube 14 results in the creation of a difference in electrical potential across {TAIL ~ the electrolyte} 
{ HEAD ~ A difference } in alkali metal vapor pressure on the opposite sides of electrolyte tube 14 results in the creation of a difference in electrical potential across { TAIL ~ the electrolyte }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL