Here's Red Roses' 1936 recipe for Egg Nog.
Beat separately the yolks and whites of 6 fresh eggs. Add 1/2 cup sugar to the yolks while beating, and 3/4 cup sugar to the whites after they have been beaten very stiff. Mix the egg whites with the yolks. Stir in 1 pint of Four Roses Whiskey and 1 ounce Jamaica rum. Stir thoroughly and serve very cold with grated nutmeg on each glass. This recipe makes 5 pints of egg nog.
Via Charm and Poise