ARE PLANTS POISONOUS.

Thames Star, Volume X, Issue 3105, 30 January 1879, Page 2

ARE PLANTS POISONOUS.

The investigations of chemists demon* strate that growing plants do exhale an almost imperceptible quantity of carbonic acid gas, which', in very small proportions, is necessary in the air we breathe. They also that the quantity exhaled at night is but the one sixteenth part of what the same plants absorb from the atmosphere during the day, and convert into nearly its own weight of oxygen, thus rendering a poisonous gas, that derives its origin, from various sources, into one of the principal elements of pure air. If oarbonio acid gas is emitted from plants in dangerous quantities, it certainly would exist largely in the night atmosphere of a close greenhouse heated to a tropical tempera*?, ture, and crowded from floor to rafter with rank vegetation..- Yet, in my experience, I have never known the slightest ill effects to be realized from night work in greenhouses, neither in cases that' have ■ frequently occurred of workmen making the warm greenhouses their sleeping quarters of a night, and even for an entire winter, which, to my satisfaction, affords practical proof that the notion is a fallacy;; and the;; can be found than greenhouse operators, who work constantly in an atmosphere where plants are growing/would prove instead, that living plantg exert a beneficial influence upon the air we breathe.— Home Florist.