Show soldiers caught in ruins san francisco the first accident in connection with the dynamiting of dangerous walls by the engineers of the army took place sunday smaller quantities of explosives than were used last week are now being fired and this necessitates two or more charges of dynamite being exploded before the desired result Is attained the engineers were working in the downtown district twice had dyna mite been exploded under the facade of a tall ruin and a third charge was being inserted when the wall fell three soldiers were buried but a mass of twisted iron partly shielded them and only one was seriously hurt |