Prepare two rubbers of wash-leather, made by tying up wool or any other substance in wash-leather; then prepare the colours which you wish the leaves to be, by rubbing up with cold-drawn linseed oil the colours you want, as indigo for blue, chrome for yellow, indigo and chrome for green, etc.; get a number of leaves the size and kind you wish to stamp, then dip the rubbers into the paint, and rub them one over the other, so that you may have but a small quantity of the composition upon the rubbers; place a leaf upon one rubber and moisten it gently with the other; take the leaf off, and apply it to the sub-stance you wish stamped; upon the leaf place a piece of white paper, press gently, and there will be a beautiful impression of all' the veins of the leaf. It will be as well if only one leaf be used one time. The leaves picked should be of one size, as otherwise the work will not look uniform.