I promised to show how the above-mentioned paste is to be made: -take the requisite quantity of flour, and mix it intimately with a little cold water in a pot, adding gradually more cold water, and keep stirring until it appears like thick milk; let it boil very slowly and keep continually stirring: as it thickens, stir it quicker, till it is a thick smooth paste, which must look quite shining. Now stir in some warm water, and let it boil slowly for half an hour. By continual slow boiling, it becomes smoother and smoother, so that it may afterwards be thinned with water, according to liking. Now lay some crumbled pipeclay in water, till the clay is penetrated and dissolved by it, stir it afterwards with water to the same consistence as the flour paste, mix these two in equal quantities, and pass them through a fine hair sieve./ When this mass is as thin as is required for water-colour painting, after it has been warmed again, spread a canvas or board with it./ If this first priming is laid on warm, it penetrates better and combines better with the object primed.,When the canvas has been spread three or four times with this compound, and all the pores are thus closed, then spread the canvas with oil in the manner already shown.,