OR IMADNEhS. 2(j'3 



cases which I have examined, the distinctive marks of the 

 existence of the disease are become so familiar, that 1 would 

 seldom seek or wish any other aids to guide my decision *. 



On a careful examination of the head, the brain and its 

 membranes will be found to have sufi'ered more or less from 

 the attack. Sometimes its vascularity is only slightly in- 

 creased, but, at others, the vessels will be found distended 

 with blood, particularly those of the pia mater. 1 have never 

 observed the membranes thickened, as in idiopathic phrenitis. 

 Inflammatory appearances within the cerebral cavity are usu- 

 ally less considerable in those cases called dumb madness t. 

 Throughout the cavity of the mouth, much of the tumefac- 

 tion which existed during life disappears after death, except 

 the base of the tongue, which often remains greatly enlarged. 

 Inflammatory marks from altered colour are, however, al- 

 ways present: sometimes this inflammatory hue pervades the 

 whole. It is, however, more usual to find distinct inflam- 

 matory blotches throughout the pharynx, and often extend- 



* Had Dr. Parry made himself acquainted with the morbid anatomy 

 of the rabid dog, even his pertinacity, in endeavouring to support a 

 strict analogy between the human and canine rabies, must have yielded 

 to the evidences before him. In the human subject, very few morbid 

 appearances present themselves, sometimes none at all, but always 

 trifling. In the dog, on the contrary, and his congeners, the most 

 striking ravages present themselves, enveloping in one specifip indam- 

 mation, parts that under no other disease are affected together. Dr. 

 Parry expressly says, " There cannot be a greater mistake than to sup- 

 " pose either that the fever of hydrophobia is of an inflammatory kind, 

 << or that its peculiar symptom arises from local inflammation of the 

 " fauces, cardia, &c. &c."— Treat, on Hydroph., p. 89. Now, if it is not 

 clear, from the morbid anatomy, that the rabies of dogs is altogether an 

 inflammatory affection (but a specific one), all our pathognoraonicks of 

 inflammation hitherto received and admitted are totally false. Neitlu-r 

 is it less clear, that all the rabid symptoms in dogs are immediately re- 

 ferrible to the state of the inflamed organs. 



t In the pig, the sheep, and the horse, I have also found evident 

 marks of visceral inflammation, and of considerable congestion withm 

 the head ; but the cavities within the mouth and throat were not affected 

 in any of those subjects which fell under my observation. 



