CLASS IT. 2. 2. 8. OP ASSOCIATION. 



to give violent pain about the middle of the parietal bone, or 

 side of the head, on the same side, which is generally called the 

 Clavus hystericus, of which an instructive case is related in 

 Sect. XXXV. 2. 1. 



Since the above was first published I have seen two cases, 

 which were very similar, and seem much to confirm the above 

 theory of sympathetic hemicrania being perhaps always owing 

 to the sympathy of the membranes about the cranium with 

 those about diseased teeth. Lord M. and Mr. B. of Edinburgh, 

 both of them about the middle of life, were afflicted with vio- 

 lent hemicrania for about two years; in the beginning of which 

 time they both assured me, that their teeth were perfectly sound, 

 but on inspecting their mouths, I found all the molares were 

 now so decayed as to have lost their crowns. After having suf- 

 fered pain for sixteen or eighteen months almost incessantly in 

 different parts of their heads, they had each of them a hemiple- 

 gia, from which they gradually recovered, as much as paralytic 

 affections generally do recover. All the stumps of their teeth, 

 which were useless, were directed to be extracted; as the swal- 

 lowing so much putrid matter from decaying bones seemed to 

 injure their digestion. They were desired not to drink wine or 

 ale without its being diluted with twice or thrice its quantity of 

 water, to prevent any access of torpor from too great previous 

 stimulus, and to take six grains of rhubarb with three of soap 

 made into pills, every night, with some bitter and very slight 

 chalybeate medicines. If the teeth which became torpid in suc- 

 cession, could have been discovered, and extracted, before they 

 decayed, and could have been replaced, might not this continu- 

 ance of pain, and consequent paralysis, have been prevented? or 

 might riot a moderate salivation have effected this purpose? 



M. M. Detect and extract the diseased tooth. Cut the af- 

 fected nerve, or stimulate the diseased membrane by acupunc- 

 ture. Venesection to six ounces by the lancet or by leeches. 

 A strong emetic and a subsequent cathartic ? and then an opiate 

 and the bark. Pass small electric shocks through the pained 

 membrane, and through the teeth on the same side. Apply vi- 

 triolic ether externally, and a grain of opium with camphor in- 

 ternally, to the cheek on the affected side, where a diseased tooth 

 may be suspected. Foment the head with warm vinegar. 

 Drink two large spoonfuls of vinegar. Stimulate the gums of 

 the suspected teeth by oil of cloves, by opium. See Class I. 1. 

 4. 4. Snuff volatile spirit of vinegar up the nostrils. Lastly, 

 in permanent head-achs, as in permanent vertigo, I have seen 

 good effect in two cases by the use of mercurial ointment rubbed 

 on the shaved head or about the throat, till a mild salivation com- 



