This large, hardy, annual plant would be considered very beautiful, were it not so common. Three quarts of clear, beautiful oil are expressed from a bushel of the seed, in the same way as linseed-oil. The seed, in small quantities, is good for fowls. It may be grown with less labor than corn. SWEET POTATO. This is a Southern plant, but is now being acclimated in Northern latitudes. Good sweet potatoes are now grown in the colder parts of Vermont, Wisconsin, and Minnesota. There are many varieties, and they are increasing by seedlings. Not long since, they were said to bear no seed; but recently, in different parts of the country, seeds have been found, and new varieties grown from them. Certain varieties are best in different localities. They will always find their way through growers of plants. The process of growing is simple, but must be carefully followed to insure success. Plant the seed potatoes in a moderate hotbed, at the time when grass begins to start freely. Keep well watered, and do not allow them to get too warm. An hour's over-heating will cause them all to decay. The heat, when it begins to rise too high, is at once checked by a thorough drenching with cold water: if too low, the heat is raised by a tight cover, in a warm sun, and by watering with warm water. Water them every day after they are up. The sprouts, when six inches high, are pulled off from the potato, and set out as cabbage-plants; this should be done as soon as all danger of frost has ceased. The same potatoes will sprout as many times as they are pulled off.