GREENHOUSE.
Greenhouses vary as much in style and cost as dwellings. The simplest is any tight enclosure, covered with a glass roof at an angle of forty-five degrees, facing the south, and kept warm by artificial heat. The temperature is not allowed to be lower than forty nor higher than seventy degrees of Fahrenheit; this will keep plants growing and make them blossom, and affords a good place for starting plants to be transplanted to out-door hotbeds, and finally to the vegetable garden, after frosts are over. There is but one main danger in greenhouse culture, and that is obviated by a little care: it is, allowing the air to become too much heated for the health of the plants; they require but little heat, but need it regularly. Some greenhouses are warmed by stoves, and serve a good purpose; others have a stove set in a flue which is built in the wall, gradually rising until it has passed around two or three sides of the building. Place three or four sheet-iron pans over this flue, at different points, and keep them filled with water; the fire in the flue will heat the water, and impart both warmth and humidity to the atmosphere, which is very favorable to the health and growth of plants. Such a house is favorable to the growth of tender exotic fruits and plants. A similar house without any artificial heat affords an excellent place for the cultivation of the finest varieties of foreign grapes.