CLASS IV. 2. 2. 3. OF ASSOCIATION. 4 1 9 



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

 fide of the head, on the fame fide, which is generally called the 

 Clavus hyftericus, of which an inftructive cafe is related in 

 Sea. XXXV. 2. i. 



Since the above was firft publifhed I have feen two cafes, 

 which were very fimilar, and fecm much to confirm the above 

 theory of fympathetie hemicrania being perhaps always owing 

 to the fympathy of the membranes about the cranium with 

 thofe about difeafed 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 affured me, that their teeth were perfectly found, 

 but on infpecting their mouths I found all the molares were 

 now fo decayed as to have loft their crowns. After having fuf- 

 fered pain for fixteen or eighteen months almoft inceiYantly 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 {lumps of their teeth, 

 which were ufelefs, were directed to be extracted ; as the fwal- 

 lowing fo much putrid matter from decaying bones feemed to 

 injure their digeftion. They were defired not to drink wine or 

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

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

 flimulus, and to take fix grains of rhubarb with three of fonp 

 made into pills, every night, with fome bitter and very flight 

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

 ceffion, could have been difcovered, and extracted, before they 

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

 ance of pain, and confequent paralyfis, have been prevented ? or 

 might not a moderate faiivation have effected this purpofe ? 



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

 fected nerve, or ftimulate the difeafed membrane by acupunc- 

 ture. Venefection to fix ounces by the lancet or by leeches. 

 A flrong emetic and a fubfequent cathartic ; and then an opiate 

 and the bark. Pafs fmall electric (hocks through the pained 

 membrane, and through the teeth on the fame fide. Apply vit- 

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

 ternally, to the cheek on the affected fide, where a difeafed tooth 

 may be fufpected. Foment the head with warm vinegar. 

 Drink two large fpoonfuls of vinegar. Stimulate the gums of 

 the futpected teeth by oil of cloves, by opium. See Clafs I. i. 

 4. 4. Snuff volatile fpirit of vinegar up the noftrils. Laflly, 

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

 good effect in two cafes by the ufc of mercurial ointment rubbed 

 on the fhaved head or about the throat, till a mild faiivation com- 

 mences, 



