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 frictions for rheumatism have been already mentioned, and the drug was formerly considered a good internal remedy for chronic muscular and articular pain, and no doubt it is often of real value when given in doses of from 5 to 20 gr. twice daily for some time - I think the smaller doses give the better results. Remedies calculated to produce diaphoresis, such as vapor-baths, should be generally combined with its use. In acute articular rheumatism it has little or no power.