First, You are to destroy all Press-Bedsteads which stand in Corners of Rooms, being made up with Boards so close, that the Air cannot penetrate or dry up and consume the moist sulphurous Vapours that are contracted. These sorts of Beds, that stand so, are apt to have them more than others. Also you are to set your other sorts of Beds as near as you can in the most Airie Places of your Rooms, exposing them to the Air the most part of the day, with your Chamber-Windows open, that the Air may freely pass, which is the most excellent Element, that does sweeten all things, and prevents Putrifaction. In the Night also you ought not to have your Window-Curtains drawn, nor your Curtains that are about your Beds; for it hinders the sweet refreshing Influences of the Air, so that the Air of all close Places becomes of a hot sulphurous Nature and Operation; the thin pure Vapours, which do wonderfully refresh Nature, are as it were suffocated: And this preventing the Influences of the Air, is in an especial manner observable, when People are sick, or out of order; as though the sweet pleasant Air had been the Cause of their Disease: such Rooms being so very close, with great Fires in them, that if a healthy Person do but continue three or four Hours in them, the fulsom Steams and thick Vapours will much disorder him, and take away the edge of his Appetite: And if so, what will the Operation be on those whose Spirits are weak and disordered with Distempers? What is more pleasant and healthful than good Air? It chears and comforts the Spirits, it opens the Passages of the Joynts and Nerves, it purifies the Blood, creates an Appetite, increasing Strength and Vigour: But, on the contrary, hot, thick, sulphurous Airs do not only obstruct the Passages of the Spirits, but suffocate them, loading the Joynts and Nerves with evil Juices, whereby the Limbs and Members become full of pain, causing a general Tenderness to possess the whole Body, and destroying the Appetite, and the Power of the Digestive Faculty in the Stomach. Also, do not all Houses and Places grow musty, and contract too great store of Moisture, if the Air be any way prevented, by Window-shutters, or the like, that it cannot have its free egress and regress? Therefore moderate Clothing, hard Beds, Houses that stand so as that the pleasant Briezes of Wind may air and refresh them, and also Houses that are full of Windows, are to be preferr'd: For where the Air hath not its free Influences, the Spirit becomes dull and heavy, this being the true Life of the Spirit in every thing.