The folly and ignorance which reign too often supreme over the sick-room, cannot be better exemplified than by this. While the nurse will leave the patient stewing in a corrupting atmosphere, the best ingredient of which is carbonic acid; she will deny him, on the plea of unhealthiness, a glass of cut-flowers, or a growing plant. Now, no one ever saw “overcrowding” by plants in a room or ward. And the carbonic acid they give off at nights would not poison a fly. Nay, in overcrowded rooms, they actually absorb carbonic acid and give off oxygen. Cut-flowers also decompose water and produce oxygen gas. It is true there are certain flowers, e.g., lilies, the smell of which is said to depress the nervous system. These are easily known by the smell, and can be avoided.