Pricking out means taking up all your seedlings and planting them in rows to grow bigger. We will tell you as we go on which flowers should be raised in this way. Seed that is to be pricked out is usually sown in a box or a shallow earthenware pan with holes in it, or in the ground under a bell-glass. Any grocer will give or sell you an empty soap or sweetmeat box that will do for seeds. It should have one or two holes bored in the bottom, and a few potsherds or bits of broken brick for drainage. The soil should be sifted and moist. A bell-glass is a dome of glass with a knob at the top, and should be about twelve inches across and ten inches high. You can get one for eighteenpence at a china-shop, and you will find it useful if you have neither a frame nor a greenhouse. You may put it on half-hardy plants at night to keep the frost from them, or on newly-sown seeds to hurry them on. In very cold weather you would leave it on plants all day, but slip a bit of wood under one side to let air in for an hour or two at noon. When you use it for seed, you do not move it until the seedlings appear. You should not prick out your seedlings until they have made four leaves besides the cotyledons. When you grow seed in pans or boxes, you do not thin out the seedlings, so they will probably be close together. If they are dry you should begin by watering them with a fine rose; then take your hand-fork, put it in close to the plants you wish to remove, dig it well down, lift gently, and a whole group of plants will come up with a lump of earth.