Beat yolks until light in color. Slowly add bourbon, cognac, while beating at slow speed. Chill 3 hrs. Add salt to whites, beat to peaks. Whip s cream until stiff. Fold whipped cream into yolk mixture, then fold in the beaten egg whites. Chill one hour. Serve with nutmeg sprinkled on top. For thinner mixture add 1 or 2 cups of milk. Serve in a punch bowl or another big bowl. The best Egg Nog drink you've ever drank!