Sift the flour, soda and 1/2 teaspoon of the cinnamon into a bowl. Rub in the butter, then stir in the brown sugar. Add the juices, egg yolk and enough of the egg white to make a dough. Roll out the dough thinly and cut into 2 inch rounds. Place on greased baking sheets. Brush with the rest of the egg white, lightly beaten. Mix the white sugar with the remaining cinnamon and sprinkle on top. Bake in a preheated moderately hot oven 375F for 15 to 20 minutes. Yield: about 50 cookies Submitted by: Laura