420 DISEASES CLASS IV. 2. 2. 9. 



mences, which, by inflaming the membranes of the teeth, may 

 prevent their irritative sympathy with those of the cranium. 

 Thus by inflaming the tendon, which is the cause of locked jaw, 

 and probably by inflaming the wound, which is the cause of hy- 

 drophobia, those diseases may be cured, by disuniting the irrita- 

 tive sympathy between those parts, which may not possess any 

 sensitive sympathy. This idea is well worth our attention. 



Otalgia. Ear-ach is another disease occasioned by the sym- 

 pathy of the membranes of the ear with those which invest or 

 surround a decaying tooth, as I have had frequent reason to be- 

 lieve; and is frequently relieved by filling the ear with tincture 

 of opium. See Class I. 2. 4. 



9. Dolor humeri inhepatidide. In the efforts of excluding the 

 faeces and urine the muscles of the shoulders are exerted to com- 

 press the air in the lungs, that the diaphragm may be pressed 

 down. Hence the distention of the tendons or fibres of these 

 muscles is associated with the distention of the tendons or fibres 

 of the diaphragm; and when the latter are pained by the en- 

 largement or heat of the inflamed liver, the former sympathize 

 with them. Sometimes but one shoulder is affected, sometimes 

 both; it is probable that many other pains, which are termed 

 rheumatic, have a similar origin, viz. from sensitive associa- 

 tions. 



As no inflammation is produced in consequence of this pain 

 of the shoulder, it seems to be owing to inaction of the mem- 

 branous part from defect of the sensorial power of association, 

 of which the primary link is the inflamed membrane of the liver; 

 which now expends so much of the sensorial power in general 

 by its increased action, that the membranes about the shoulder, 

 which are links of association with it, become deprived of their 

 usual share, and consequently fall into torpor. 



10. Torpor pcdum in eruptione variolarum. At the commence- 

 ment of the eruption of the small -pox, when the face and breast 

 of children are very hot, their extremities are frequently cold. 

 This I ascribe to sensitive association between the different parts 

 of the skin; whence when a part acts too violently, the other 

 part is liable to act too weakly; and the skin of the face being 

 affected first in the eruption of the small-pox, the skin of the feet 

 becomes cold in consequence by reverse sympathy. 



M. M. Cover the feet with flannel, and expose the face and 

 bosom to cool air, which in a very short time both warms the 

 feet and cools the face; and hence what is erroneously called a 

 rash, but which is probably a too hasty eruption of the small-pox, 

 disappears; and afterwards fewer and more distinct eruptions of 

 the small-pox supervene. 



