Heat oven to 325 degrees. In a small mixer bowl, beat egg yolks until very thick and lemon colored, about 5 minutes. Pour yolks into large mixer bowl; gradually beat in sugar. On low speed, mix in flour, baking powder and salt alternately with water, flavorings and lemon peel. In another large mixer bowl, beat egg whites and cream of tartar until stiff. Gradually fold egg yolk mixture into egg whites. Pour into ungreased tube pan 10 x 4 inches. Bakd 60-65 minutes. Invert pan on funnel; let hang until cake is completely cooled.
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