PLANTS IN ROOMS.
It is very difficult to make plants grow in rooms. They must necessarily be deficient in the three important auxiliaries to vegetable life, light, air, and moisture; the latter of which cannot be maintained in apartments that are daily occupied. In large towns, plants cannot thrive even in the open air, as the minute particles of soot, which are constantly floating about, settle upon their leaves, and choke up their pores. The gases produced by the combustion of coal, &c., are also injurious to plants. Sulphurous acid, which abounds in the atmosphere of London, turns the leaves yellow; and the want of evaporation and absorption by the leaves prevents the proper elaboration of the sap, and makes the trees stunted and unproductive.
Ibid.