And you should therefore look to the position of the beds of your sick one of the very first things. If they can see out of two windows instead of one, so much the better. Again, the morning sun and the mid-day sun-- the hours when they are quite certain not to be up, are of more importance to them, if a choice must be made, than the afternoon sun. Perhaps you can take them out of bed in the afternoon and set them by the window, where they can see the sun. But the best rule is, if possible, to give them direct sunlight from the moment he rises till the moment he sets. Another great difference between the _bed_-room and the _sick_-room is, that the _sleeper_ has a very large balance of fresh air to begin with, when he begins the night, if his room has been open all day as it ought to be; the _sick_ man has not, because all day he has been breathing the air in the same room, and dirtying it by the emanations from himself. Far more care is therefore necessary to keep up a constant change of air in the sick room. It is hardly necessary to add that there are acute cases (particularly a few ophthalmic cases, and diseases where the eye is morbidly sensitive), where a subdued light is necessary. But a dark north room is inadmissible even for these. You can always moderate the light by blinds and curtains. Heavy, thick, dark window or bed curtains should, however, hardly ever be used for any kind of sick in this country. A light white curtain at the head of the bed is, in general, all that is necessary, and a green blind to the window, to be drawn down only when necessary. [Sidenote: Without sunlight, we degenerate body and mind.] One of the greatest observers of human things (not physiological), says, in another language, "Where there is sun there is thought." All physiology goes to confirm this. Where is the shady side of deep vallies, there is cretinism. Where are cellars and the unsunned sides of narrow streets, there is the degeneracy and weakliness of the human race--mind and body equally degenerating. Put the pale withering plant and human being into the sun, and, if not too far gone, each will recover health and spirit. [Sidenote: Almost all patients lie with their faces to the light.]