Put the butter in a saucepan, and set it on the fire; when melted, add the carrots and the onions sliced, stir now and then till they begin to turn brown; then add the warm water, vinegar, garlic, parsley, thyme, clove, bay-leaf, pepper-corns, a little grated nutmeg, and salt. Simmer about an hour, strain, and it is ready for use.