One pound of washing soda, one pound of lard or clear tallow, half a
pound of unslaked lime, one tablespoonful of salt, three quarts of
water. Put the soda and lime in a large dish, and pour over the water,
boiling hot; stir until dissolved; let it stand until clear, then pour
off the clear liquid, add the grease and salt; boil four hours, then
pour into pans to cool. If it should be inclined to curdle or
separate, indicating the lime to be too strong, pour in a little more
water, and boil again. Perfume as you please, and pour into molds or a
shallow dish, and, when cold, cut into bars to dry.