THINGS THAT WERE INVENTED IN CHICAGO vacuum cleaner [1869] elevated railway [1883] skyscrapers [1885] softball [1887] open heart surgery [1893] ferris wheel [1893] zipper [1896] fixed trunnion bascule bridge [1902] electric washing machine [1910] pinball machine [1931] twinkie [1931] spray paint [1949] Probably the electric washing machine.
You wouldn't get as good of a result because gold is a much better conductor than aluminum.
