Dixon. 
Phil. Trans. A.^ Vol. 200, PI. 15. 
Fig. 44.—Retonation-wave and 
Reflexion-wave. 
Fig. 45.—Retonation-wave started 
at end of tube. 
Fig. 46.—Retonation-waves formed 
by explosion in centre of long tube. 
Fig. 47.—Retonation-waves formed 
at ends of short tube. 
C2N2 -f" ^ 2 - 
