This section is from the book "Materia Medica And Therapeutics Inorganic Substances", by Charles D. F. Phillips. Also available from Amazon: Materia medica and therapeutics.
Sulphur was well known to the ancients as a remedy in consumption, and Galen ordered to phthisical patients inhalation of the vapor from the crater of Etna. It is not much used internally in modern practice, but for chronic phthisis the springs at Weilbach have a favorable reputation.
Sutro finds sulphur of good service in some cases of phthisis, and the presence of haemorrhoids is one indication for it; he suggests that it combines with the iron of effete blood-corpuscles, quickens the elimination of this and other residua, and thus relieves the portal system and indirectly the lungs (Medical Times, i., 1862, p. 362), and I quite agree with those observers who have noted, in this disease, much advantage from the use of sulphur both internally and by inhalation. Dr. Dewar relates instances where sulphurous acid and steam acted unexpectedly well on phthisical subjects exposed to them (Medical Times, i., 1867). A spray containing sulphurous acid facilitates expectoration, and also disinfects and lessens purulent secretion, and so far relieves certain symptoms, but has no specific power over the disease.