This section is from the book "The Lady's Assistant: Family Physician", by P. Davey and B. Law.
In this class anodynes are generally mentioned, which I have already spoken of. They act by allaying spafms and appeasing violent motions. In this cafe, nitre or salt-petre. is of extraordinary use, because it acts by restraining the hot sulphureous parts of the blood, by moistening the solids, and curbing their exorbitant motions; upon which account it is anodyne, and good against spafms. Cinnabar is of great service in appeasing convulsive and epileptic disorders, for it dissolves the thick mucus which affects the brain and spinal marrow. Camphire mixt with nitre is excellent in pain, watching, and deliriums attending inflammations. Assa foetida relaxes the spasms of the interlines in hysteric fits, by opening the obstructions of the glands and other vessels.