Preheat oven to 350°F. Mix flour, baking soda and salt. In a separate bowl, beat eggs, then add vanilla. In a larger bowl, cream butter and sugar. Add flour mixture, egg mixture and milk, beating well after each addition. Lightly coat cherries in flour to prevent them from sinking in the cake. Stir cherries into batter with a spoon. Pour into a greased and floured tube pan (you can also line the bottom with waxed paper). Bake for 1 1/2 hours.