Into a bright tinned kettle put 3 1/2 lbs. of sugar, 1 1/2 pints of water, and a full tablespoonful of cream of tartar. Place over a hot fire and stir until the lumps disappear. Boil briskly until the candy is hard and brittle when a little is thrown into cold water. Take the candy from the fire and pour it on a large platter, greased with a little butter. When cooled sufficiently to be handled, add a teaspoonful of finely powdered tartaric acid, and the same quantity of extract of lemon, and work them into the mass. The acid should be fine and free from lumps. The mass must be worked enough to distribute the acid and lemon extract evenly, but no more, as too much handling destroys its transparency. It may now be formed into sticks or drops, or spread out flat on tins in thin sheets.