Pound, and sift some treble-refined sugar through a lawn sieve, and put it into an earthen pan, which must be quite free from grease; to each pound of sifted sugar add the whites of three eggs, or sufficient to make it into a paste of a moderate consistence, then with a wooden spoon or spatula beat it well, using a little lemon-juice occasionally, and more white of egg if you find that it will bear it without making it too thin, until you have a nice light icing, which will hang to the sides of the pan and spoon; or, if it is dropped from the spoon, it should remain on the top without speedily losing the form it assumed. A pan of icing, when well beat and finished, should contain as much again in bulk as it was at the commencement: use sufficient lemon-juice to give the icing a slight acid, or it will scale off the cake in large pieces when it is cut. Many prefer the pyroligneous acid to the lemon-juice, but the flavour is not so delicate, and it always retains a smell of the acid; neither did I ever find, as some assert, that it improves the quality and appearance of the icing; the only advantage derived from it is that of economy.