Preheat oven to 325 degrees.
Cream butter with sugar until light and fluffy.
In a separate bowl, beat egg yolks until light and
lemon colored; blend
into creamed mixture.
Sift together cake flour, baking powder and salt; resift
3 times.
Add the sifted ingredients in thirds, alternating with
milk.
Add vanilla, grated lemon rind and lemon juice and
beat 2 minutes.
Bake in a greased Bundt pan for 1 hour or until a straw
inserted in the
center comes out clean.