Air Beds are very useful for invalids, as they maintain a uniformly soft surface,and do not, like feather beds, take an unyielding impression from the weight of the body lying upon them. They require no making as it is termed,and an invalid can, with9ut difficulty,change his position upon them.
They are made of some air-tight material.When in use they require to be filled with air; but when not in use, the air may be let off by means of the valve/and the bed folded up.
Great care should be taken that the valve is in proper order, or the bed may collapse and cause much annoyance to the patient.
