DISEASES OF ASSOCIATION. SECT. XXXV. 2. 



commences, are not unfrequent ; as this is the ge- 

 neral origin of thofe pains, which continue fome 

 time without being attended with inflammation, fuch 

 as the pain at the pic of the ftomach from a ftone 

 at the neck of the gall-bladder, and the pain of 

 ftrangury in the glans penis from a ftone at the neck 

 of the urinary bladder. In both thefe cafes the 

 part, which is alfecled fecondarily, is believed to 

 be much more fenfible than the part primarily af- 

 fected, as defcribed in the catalogue of difeafes, 

 ClafsJI. i. i. H. and IV. 2. 2.2. and IV. 2. 2. 4. 



The hemicrania, or nervous heau-ach, as it is 

 called, when it originates from a decaying tooth, 

 is another difeafe of this kind ; as the pain of the 

 carious tooth always ceafes, when the pain over one 

 eye and temple commences. And it is probable, 

 that the violent pains, which induce convulfions in 

 painful epilepfies, are produced in the fame man- 

 ner, from a more fenfible part fympathizing with a 

 difeafed one of lefs fenfibility. See Catalogue of 

 Difeafes, Clafs IV. 2. 2. 8. and III. i. i. 6. 



The laft tooth, or dens fapientise, of the upper 

 jaw moft frequently decays firft, and is liable to 

 produce pain over the eye and temple of that fide. 

 The laft tooth of the under jaw is alfo liable to 

 produce a fimilar hemicrania, when it begins to de- 

 cay. When a tooth in the upper jaw is the caufe 

 of the beadach, a (lighter pain is fometimes per- 

 ceived on the cheek-bone. And when a tooth in 

 the lower-jaw is the caufe of headach, a pain fome- 

 times affects the tendons of the mufcles of the neck, 

 which are attached near the jaws. But the clavus 

 hyilericus, or pain about the middle of the parietal 

 bone on one fide of the head, I have feen produced 

 by the fecond of the molares, or grinders, of the 

 under jaw; of which I (hall relate the following 

 cafe. See Clafs iV. 2. 2. 8. 



Mrs. 



