The proper regulation of the atmosphere as to moisture and temperature, is one of the most important points to be observed in cultivating plants in the parlor, or window-garden. Plants will not flourish, bloom, and be healthy, in a dry, dusty atmosphere, even though the best of care otherwise may be bestowed upon them; hence it is that those who attempt to raise plants in their dwellings meet with so little success. There is an immense contrast between the atmosphere of a well regulated green-house and that of an ordinary dwelling. In the green-house, the atmosphere is moist and well-tempered to the healthful growth of plants; while that of the parlor or sitting-room is invariably dry and dusty, and plants will not flourish in it as they would in the conservatory. If the dwelling be heated by coal, there is more or less gas constantly discharged into the air of the room, which is of itself enough to destroy vegetation, or make it sickly. Houses heated by steam, are better adapted to the cultivation of plants.

All plants will not flourish in the common temperature of a living-room; some require a low temperature, and others need a warmer one. The following plants require a temperature of from 70° to 80° in the day-time, and 55° to 60° at night Begonias, Coleuses, Calceolarias, Bouvardias, Ferns (tropical), Hibiscuses, Poinsettias, Tuberoses, Heliotropes, Crotons, Hoyas, Cactuses, all kinds, Caladiums, Cannas, Palms, Orange and Lemon Trees, Geraniums, etc.

The following will do well in an atmosphere ranging from 50° to 60° by day, and 40° to 45° by night: Camellias, Azaleas, Oleanders, Roses, Carnations, Callas, Ivies, Abutilons, Jessamines, Holland-bulbs, Lily-of-the-Valley, Primroses, Violets, Verbenas, Chrysanthemums, etc. Plants will flourish better in the kitchen, where the steam and moisture from cooking are constantly arising, and tempering the atmosphere, than in a dry, dusty sitting-room; hence it is that we find "Bridget" sometimes cultivating a few plants in her kitchen window, that are envied by the mistress of the house, because they are so much finer than those in her parlor or sitting-room.

If a pan of water is set upon a stove in a room where plants are growing, it will help to materially relieve the dryness of the atmosphere. But most all kinds of house-plants will do fairly in a uniform temperature, from 70° by day to 55° by night. Careful observation of the habits and requirements of different kinds of plants, as they come under our care, will greatly assist the cultivator, and in a short time he will be so conversant with their various habits as to know just how to properly treat each and every plant in his collection.

INSECTS UPON PLANTS.

The little green insects so frequently seen on house-plants, are called aphis (plural aphides), plant-lice, or green-fly. They feed upon the tender growth of plants, especially the new leaves, and will rapidly sap and destroy the life of any plant if allowed to remain undisturbed. In the spring these insects abound in great numbers on the plants in green-houses and parlors, or wherever they may be growing, and the remedy should be promptly applied. The greatest enemy to the green-fly is tobacco smoke, made by burning the stems, the refuse of the cigar-maker's shops; allowing the smoke to circulate among the leaves to which the insects are attached, will readily exterminate them. Place the infested plant under a barrel, an ordinary cracker barrel will do, and put under it a pan of burning tobacco, slightly moistened with water. Leave the plant in the smoke for fifteen or twenty minutes, after which remove it. If one "smoking" fails to destroy the insects, repeat the dose three or four times, once each day, until they are completely exterminated.

A strong solution, or "tea," made from soaking tobacco stems in water, and syringing the same over the plants, will effectually destroy the little pests, and not injure the plant in the operation.