, ▁pract ically ▁mand atory ▁in ▁early ▁musical s , ▁but ▁in ▁their ▁featured ▁spot ▁the ▁novel ty ▁is ▁that ▁they ▁are ▁se ated . ▁ ▁The ▁grand ▁finale ▁is ▁the ▁Mel ting ▁Pot ▁of ▁Music ▁production ▁number , ▁in ▁which ▁various ▁imm igr ant ▁groups ▁in ▁national ▁cost ume ▁offer ▁brief ▁rend itions ▁of ▁characteristic ▁songs ▁from ▁their ▁native ▁lands , ▁after ▁which ▁they ▁are ▁all ▁cons igned ▁to ▁the ▁American ▁Mel ting ▁Pot . ▁Perform ers ▁from ▁some ▁of ▁the ▁earlier ▁musical ▁numbers ▁briefly ▁repr ise ▁their ▁acts ▁while ▁reporting ▁for ▁duty ▁as ▁fuel ▁under ▁the ▁pot . ▁Wh item an ▁st irs ▁the ▁ste aming ▁ste w . ▁When ▁the ▁cook ing ▁is ▁complete , ▁everyone ▁emer ges ▁transformed ▁into ▁a ▁jazz - h appy ▁American . ▁ ▁There ▁are ▁a ▁couple ▁of ▁early ▁examples ▁of ▁the ▁overhead ▁views ▁later ▁elabor ated ▁and ▁made ▁famous ▁by ▁Bus by ▁Ber keley , ▁but ▁this ▁film ▁be ars ▁little ▁res embl ance ▁to ▁his ▁films ▁and ▁other ▁musical s ▁of ▁the ▁later ▁ 1 9 3 0 s . ▁It ▁is ▁very ▁much ▁a ▁stage ▁presentation , ▁al beit ▁on ▁a ▁very ▁large ▁stage , ▁and ▁visual ▁interest ▁is ▁maintained ▁only ▁by ▁changes ▁of ▁view point . ▁The ▁cam eras ▁do ▁not ▁move . ▁This ▁is ▁not ▁because ▁the ▁Techn icol or ▁cam eras ▁were ▁heavy ▁and ▁bul ky . ▁The ▁cam eras ▁used ▁for ▁this ▁early ▁Techn icol or ▁process ▁contained ▁a ▁single ▁roll ▁of ▁film ▁and ▁were ▁of ▁nearly ▁ordinary