Boil a pound of sugar to the degree beyond its forming large pearls or bubbles on the surface, and when the first heat has subsided, whip it into five whipped whites of eggs; flavour with zest of orange-peel; fill a biscuit-forcer, and lay out the biscuits in small oval forms upon buttered and floured baking-sheets; dredge them over with sugar and chopped pistachios, and bake them with moderate heat.