"Much has been written on the subject by French authors, from which it appears that in the north of France, and in cold countries generally, the walnut does not bud or graft easily by any mode; but that in the south of France and north of Italy it may be budded or grafted by different modes, with success. At Metz, the Baron de Tschoudy found the flute method (Fig. 76) almost the only one which he could practice with success. By this mode an entire ring of bark, containing one or more buds, is removed from a twig on a tree to be multiplied, and transferred to the stock, and made to fit as shown. If the ring is too large, a slice may be cut off; and if too small, a piece of the bark of the stock may be left to fill the space." Both stock and parent tree must be in about the same condition or stage of growth when this ring budding is done, in order that the bark containing the bud may peel off freely from the wood, and this is always in the spring, soon after the buds begin to unfold and the sap is in motion. Loudon says that in Dauphine, France, young plants in the nurseries are budded chiefly by this mode, which succeeds best the closer the operation is performed to the collar of the plant; and the same is true in grafting, the nearer the root the better, as has been found by experience with hickories. [Illustration: FIG. 76. FLUTE BUDDING.] Charles Baltet, in his "L'Art de Greffer," recommends grafting in the usual mode of crown grafting, also flute or ring grafting, in April or May, and ordinary cleft grafting close to the root and at the forks of the branches, etc. He says that the cion should be cut, as much as possible, obliquely across the pith, so that it may be exposed on one side only. He also advises using cions whose base consists of wood of two years' growth, and these furnished with a terminal bud. He cautions propagators against grafting early-growing kinds upon those of later vegetation. If walnuts of any of the native or foreign species have been successfully propagated by budding or grafting, at any of the nurseries in our Eastern States, it has not been made known in the nurserymen's catalogues. Michael Floy, who early in the present century had quite extensive grounds devoted to fruit and ornamental trees, near what is now the center of New York city, as we learn from his "Guide to the Orchard," published in 1833, claims, in this work, that the Persian walnuts thrive well in this country, but admits that he had never succeeded in grafting the trees, and with the hickories had no better success, although he had tried them many times; but he adds: "Still I do not say it is impossible either to bud or graft them; but there is something peculiar about it, for both the bud and graft turn black when cut, almost instantaneously. Others may succeed better, but let them try it before they affirm it upon hearsay; they may succeed very well by inarching."