That wet linen should produce good and evil results appears paradoxical. Damp beds are said to lead to injurious consequences, whilst wet linen applied as a covering to the whole or parts of the body, produces the most happy effects. Accustomed as Priessnitz is to witnessing none but the best results from the application of damp linen, he could not be persuaded that mischief arose even from lying in damp beds. In the Hydropathic practice the body is so hermetically enclosed in the wet sheet, that not a particle of heat can escape or external air penetrate, by which means the exhalation is concentrated upon the body; this may be termed a linen bath or fomentation. In the case of people being accidentally put into a damp bed, none of the above precautions are taken; there is no extra clothing, no binding about the neck to prevent the escape of caloric, and therefore to these causes must be attributed the mischief, if any ensue. It is, however, a question, where mischief follows, whether one-twentieth part of the cases can be fairly attributed to the damp beds. It is highly probable that Priessnitz's surmise of its being the development of a disease lurking in the system which under the Water-cure might easily be met, is correct. Wet sheets are resorted to in all fevers, and changed until the paroxysm is abated. In Typhus, the sheet is changed every ten minutes, and as often as forty or fifty times in a day. As a general rule, Mr. Priessnitz told me, if unwell, without waiting to know the ailment--to take a packing-sheet, until warm, twice a day, followed by a tepid bath. Packing-sheets may be persevered in for years in obstinate cases. The usual time employed in their application is until the body is warm, which will be from twenty-five to forty minutes. It is a great mistake to suppose the application of the sheet is to produce perspiration. If a genial heat pervades the body, it is all that is required, unless under peculiar circumstances, previous to immersion in either tepid or cold water. The following anecdote, told me by Major Beavan, is adduced as corroborative evidence in favour of the use of wet linen to lower the temperature of the body. In 1821, the Major having to pass through extensive jungles to join his regiment in the East Indies, a distance of nearly 300 miles, caught a fever. When at the highest stage of the hot fit, it occurred to him that he might cool himself as they did wine and other liquids in that climate. He accordingly had himself wrapped up in a wet sheet for a quarter of an hour, when, finding himself relieved, he added a number of coverings, and fell into a most refreshing sleep of some hours. On awaking, he found mind, body, and appetite restored, all of which had been prostrated to an extreme degree for several days.