MAYONNAISE THICKENED WITH ARROWROOT.—This is pro-pounded by Dubois also. If there be a difficulty in getting the mixture to thicken properly owing to inferior oil or the tem-perature, the following process will set matters right:—Dilute in cold water a large spoonful of arrowroot. Warm this over a low fire in a small saucepan till you get it to the consistency of smooth batter, rather thick than otherwise. As soon as satis-factory, put it into a bowl and work it about to cool it; season it with half a teaspoonful of pepper, a teaspoonful of salt, and one of mustard powder; add three or four yolks of raw eggs, and whisk the mixture with a quarter of a pint of oil added by degrees. Finish with tarragon vinegar, and garnish, if you like, with some chopped parsley, fresh tarragon leaves, or chervil. This method can be depended upon, he says, for certain.