Orange Cake
["3 1/2 c. plain flour", "1 1/2 c. castor sugar", "3/4 c. margarine", "1 1/2 c. fresh orange juice", "4 eggs", "2 level tsp. baking powder", "1 level tsp. soda", "2 level Tbsp. rind of orange"]
["Sift the flour with the baking powder.", "Cream the margarine and sugar until pale and fluffy.", "Add yolks one at a time.", "Beat well between each addition.", "Whisk egg whites until stiff; mix soda with orange juice.", "Add orange juice to the margarine and sugar mixture, mixing well.", "Alternate by adding to the margarine mixture a spoonful of flour and a spoonful of egg white, mixing well with a wooden spoon to avoid curdling.", "Stir in the orange rind; pour into a greased pan.", "Bake in a preheated oven for 45 minutes at 350\u00b0 or for about an hour."]
["flour", "castor sugar", "margarine", "orange juice", "eggs", "level tsp.", "soda", "level"]