0 th ▁century , ▁the ▁amount ▁of ▁verm outh ▁stead ily ▁dropped . ▁During ▁the ▁ 1 9 3 0 s ▁the ▁ratio ▁was ▁ 3 : 1 ▁( gin ▁to ▁verm outh ), ▁and ▁during ▁the ▁ 1 9 4 0 s ▁the ▁ratio ▁was ▁ 4 : 1 . ▁During ▁the ▁latter ▁part ▁of ▁the ▁ 2 0 th ▁century , ▁ 6 : 1 , ▁ 8 : 1 , ▁ 1 2 : 1 , ▁ 1 5 : 1 ▁( the ▁" Mont gom ery ", ▁after ▁British ▁Field ▁Marsh al ▁Bernard ▁Mont gom ery ' s ▁supposed ▁pen chant ▁for ▁attack ing ▁only ▁when ▁in ▁possession ▁of ▁great ▁numerical ▁superior ity ), ▁or ▁even ▁ 5 0 : 1 ▁or ▁ 1 0 0 : 1 ▁Martin is ▁became ▁considered ▁the ▁norm . ▁ ▁A ▁dirty ▁mart ini ▁contains ▁a ▁spl ash ▁of ▁o live ▁br ine ▁or ▁o live ▁ju ice ▁and ▁is ▁typically ▁g arn ished ▁with ▁an ▁o live . ▁ ▁A ▁perfect ▁mart ini ▁uses ▁equal ▁amounts ▁of ▁sweet ▁and ▁dry ▁verm outh . ▁ ▁Some ▁mart in is ▁were ▁prepared ▁by ▁filling ▁a ▁co ck tail ▁glass ▁with ▁g in , ▁then ▁rub bing ▁a ▁finger ▁of ▁verm outh ▁along ▁the ▁rim . ▁There ▁are ▁those ▁who ▁advoc ated ▁the ▁elim ination ▁of ▁verm outh ▁altogether . ▁According ▁to ▁No ël ▁Cow ard , ▁" A ▁perfect ▁mart ini ▁should ▁be ▁made ▁by ▁filling ▁a ▁glass ▁with ▁g in , ▁then ▁w