Parisian Essence

To make this colouring which is

To make this colouring which is used to give stews, gravies and soups a rich brown colour, put some sugar on the fire or gas, in an old saucepan. Stir it till it melts, and allow it to go on cooking until it is burnt quite black, and all sweetness has gone. Then pour some water over it, and it will boil in a tempestuous manner for a minute or so. Do it over the sink, so that if it splatters it will not do harm. Let it stand for half an hour, and pour off into a bottle. A few drops will colour.