Pneumonia, Hot Vinegar Applications for

"Over the lungs lay cloths wet in clear hot vinegar. They should be five or six inches square and several thicknesses. Over the cloths lay a hot plate or hot water bottle; change as often as necessary to keep them hot. This treatment will soon give relief, after which rub as much oil into the lungs as possible."

Source: Mother's Remedies: Over One Thousand Tried and Tested Remidies from Mothers of the United States and Canada, T. J. Ritter