157 
Fic. 61.—Shot 88 ; 1,900-lb. charge of 50/50 Amatol 64 feet below the surface ; 
the “ plumes ”’ are 220 feet high. 
Fic. 62.—Shot 89 ; 1,900-Ib. charge of 50/50 Amatol 64 feet below the surface ; the “dome” is 53 feet high. 
