Show bubble in in a sapphire thi ete Is exhibited in the british mu mn cauin a sapphire weighing nine carats barats and a bubble babble that appears and disappears with clinn ses es of tern tem geniture ien iscra iture ture it Is believed that a 0 cavity in the gum guin a quantity of 0 carbonic acid gas ens wid I 1 er great press pressure ure when the temperature Is such each as to pond with the critical point for the gas ens under tinder the particular pres pure anre twIlI cb it la Is subjected la in KB its brilliant prison hou housa te it liquefies and becomes visible ns as a bubble |