A Victorian recipe. I do not think the use of both loaf and granulated sugar has any effect. I have made the ice with 1½; lb . (720 g.) of caster sugar, and it was perfect. The ice comes out as white as snow.
Rub the loaf sugar on the lemon rind so that it soaks up the fragrant lemon oils.
Put the strained lemon juice and the granulated and loaf sugar into the cold water, stir till the loaf sugar is dissolved, and set it to freeze. When nearly set, add the beaten egg whites.
©1975 The Estate of Elizabeth Ayrton