Bulbous roots are propagated by offsets; some growing on the top, others around the sides. Many plants are propagated by cutting off twigs, and setting them in earth, so that two or three eyes are covered. To do this, select a side shoot, ten inches long, two inches of it, being of the preceding year's growth, and the rest, the growth of the season when it is set out. Do this, when the sap is running, and put a piece of crockery at the bottom of the shoot, when it is buried. One eye, at least, must be under the soil. Water it, and shade it in hot weather. Plants are also propagated by layers. To do this, take a shoot, which comes up near the root, bend it down, so as to bring several eyes under the soil, leaving the top above ground. If the shoot be cut half through, in a slanting direction, at one of these eyes, before burying it, the result is more certain. Roses, honeysuckles, and many other shrubs, are readily propagated thus. They will generally take root, by being simply buried; but cutting them, as here directed, is the best method. Layers are more certain than cuttings. For all woody plants, budding and grafting are favorite methods of propagation. In all such plants, there is an outer and inner bark; the latter containing the sap vessels, in which the nourishment of the tree ascends. The success of grafting, or inoculating, consists in so placing the bud or graft, that the sap vessels of the inner bark shall exactly join those of the plant into which they are grafted, so that the sap may pass from one into the other. The following are directions for _budding_, which may be performed at any time from July to September.