Beat egg whites in large mixer bowl until soft peaks form Add 6 tablespoons sugar gradually beating until stiff peaks form Cream remaining sugar and butter in large mixer bowl until light and fluffy
Add egg yolks beat well
Sift flour 3 times
Mix vanilla with half and half in small bowl
Add to creamed mixture alternately with flour beating well after each addition
Beat at low speed for 10 minutes
Add egg whites by tablespoonfuls stirring vigorously
Pour into lightly greased 10-inch tube pan Bake at 300 for 1 34 hours