Lemon Meringue Pie

I found this recipe in an old cookbook with no cover. Father Chester Kozal, International Falls, Minn. Ingredients- 1 graham cracker crust, 1/2 cup lemon juice, 1 tsp. grated lemon rind, 1/4 tsp. cream of tartar, 1 1/3 cup Eagle brand condensed milk, 2 eggs, seperated, 4 tbsp. sugar. Instructions- Combine juice and grated rind, gradually stir into milk. Add egg yolks and stir. Pour into crust. Add cream of tartar to whites, beat until stiff, adding sugar gradually. Brown in oven.