Separate eggs; discard yolks or refrigerate for another use. Measure egg whites, adding or removing whites as needed to equal 1-1/2 cups. Place in a mixing bowl; let stand at room temperature for 30 minutes.

Meanwhile, sift sugar and flour together three times; set aside.

Add cream of tartar, extracts and salt to egg whites; beat on high speed. Gradually add sugar, beating until sugar is dissolved and stiff peaks form. Fold in flour mixture, 1/4 cup at a time. Gently spoon into an ungreased 10-in. tube pan. Cut through batter with a knife to remove air pockets. Bake at 350 degrees F for 40-45 minutes or until cake springs back when lightly touched. Immediately invert pan; cool completely before removing cake from pan.