The principal advantages of this mode of propagation are the following: 1st. The facility with which new and rare kinds can be multiplied, as every well ripened bud almost can be transformed into a plant. 2d. As the plants are started under glass, by bottom heat, it lengthens the season of their growth from one to two months. 3d. Every variety of grape can be propagated by this method with the greatest ease, even those which only grow with the greatest difficulty, or not at all, from cuttings in open ground. As to the merits or demerits of plants grown under glass from single eyes, to those grown from cuttings or layers in open ground, opinions differ very much, and both have their advocates. For my part, I do not see why a plant grown carefully from a single eye should not be as good as one propagated by any other method; a poor plant is not worth having, whether propagated by this or any other method, and, unfortunately, we have too many of them. THE PROPAGATING HOUSE. I will only give a description of a lean-to of the cheapest kind, for which any common hot-bed sash, six feet long, can be used. Choose for a location the south side of a hill, as, by making the house almost entirely underground, a great deal of building material can be saved. Excavate the ground as for a cellar--say five feet deep on the upper side, seven feet wide, and of any length to suit convenience, and the number of plants you wish to grow. Inside of the excavation set posts or scantlings, the upper row to be seven feet long above the ground, and two feet below the ground; the lower row four and one-half feet above the ground, so that the roof will have about two and one-half feet pitch. Upon these nail the rafters, of two-inch planks. Then take boards, say common inch-plank, and set them up behind the posts, one above the other, to prevent the earth from falling in. This will make all the wall that is needed on both sides. On the ends, boards can be nailed to both sides of the posts, and the intervening space tilled with spent tan or saw-dust. Upon the rafters place the sash on the lower side; the upper side may be covered with boards or shingles, where also the ventilating holes can be left, to be closed with trap-doors. The house is to be divided into two compartments--the furnace-room on one end, about eight feet long, and the propagating house, The furnace is below the ground, say four feet long, the flue to be made of brick, and to extend under the whole length of the bench. To make the flue, lay a row of bricks flat and crosswise; on the ends of these place two others on their edges, and across the top lay a row flat, in the same way as the bottom ones were placed. This gives the flue four inches by eight in the clear. The flue should rise rather abruptly from the furnace, say about a foot; it can then be carried fifty feet with, say six to nine inches rise, and still have sufficient draft. Inside of the propagating room we have again two