MEDICINE. 



at certain periods of life, the 

 of the wteatBMl canal are 

 distended with blood, that they are 



and discharge their 

 and 



that they should be eva- 



the 



be prevented from taking 

 of a local natvre, ge> 

 to 



fore whatever regard* either its cause or it* cure, may I'ncti.c. 

 be considered more in the light of a question of curious '""Y" 1 *' 

 peculation, thtn of any great practical utility. 



CHAP. II. 

 ffettrotet. Prmmry Dttratrt o/ Ike Nervatu Sytlrm. 



We now come to the Neurones, the second great clan Ncuroto. 

 of diseaati thoar depending upon a primary affection 

 of the nervous system. At the phenomena of semibili- 

 ty are more peculiar, and more unJike the other func- 

 tions of matter, than eren those of the muocular fihre, 

 so its morbid affections ere proportionally singular mid 



be always regarded aaa 

 editing in the acute form, a* we observe it in infants, 

 connected with the dieease which i* popularly called 

 Thrash, arm that mere chronic state, appearing in con- 

 nexion with Scurvy, or attacking individual* who have 

 a*T*d from a long residence in hot climate*. In both 

 caeet the cure depend* upon restoring the 

 tien of the alimentary canal, and the orgoH 



i', ( (-in i r:i <! in tfir- t,i:n* -i ..' <'. jt * \, t t\ 



Purpura i. likewise, at lca*t far the most part, mere- 

 ly iimptumatk, appear ng in the later stage* of malig- 

 nant fever, mere especially in those where the eon 

 Mot part* of the body seem to have a tendency to 



wtion. Some caees, bowever. have occurred, 

 Purpura he* existed without a proportionable 

 of the febrile state, or indeed where this ha* 

 ent. but they are involved in con- 

 ity ; ami we have little certain infbr- 

 rither their future, or their imme- 

 1 he same uncertainty also re- 

 t of the idiopathic Purpura ; for while we 

 are told from high authority, that it in relieved by to- 

 mes. and eepecieJty by the mineral acid*, we have 



. favour of blood-letting. 



difficult both to 



nrehend ami to describe. The 



connexion which the different part* of the nervous v- 

 tern bear to each other, i* one of its most remarkable 

 properties, and it is exhibited in a variety of striking 

 examples in its morbid states. We can generally assign 

 to each of the P*iha.ia*aia it* primary seat, either by 

 of our sensations, or of some vUible change 

 the part experience*, but in the Neuroses, we 

 hare neither of these circumstances to direct us ; there 

 i* frequently no visible alteration in the structure of the 

 part affected, while our feeling* afford but little aasiet- 

 ance in informing M of the original situation of the 

 disease. The raftamatanri which must chiefly direct 

 M in eur arrangement ef this ems*, is the dcgrer in 

 the power exist*, whether it be morbidly in- 

 i, or morbidly diminished, with relation to the 

 of health ; to this we have added another <li- 

 vition of MooD*, which are simply irregular, without 

 any regard to the mere quantity of effect produced. 

 These three orders we have denominated respectively, 



r.rrthxmi. Aithrtu.i-. rul >|*mi. 



S*KT. 1. Hypeneilkii*. 



Afectiau depending upon an 

 of Ike Afire*)* *e**r.M. 



We have divided the order Firthimm into the two 

 gajwraof Hyperwsthaai* and Autalgisr ; the Ant coneiat- UM*|SN 

 I arneibility , a* manileeted by the 

 i external sense*, or of the orga- 

 nic functmns. the Utter o*ntehnJiiy those diseases 

 WMW toMfV t* pun in kUiy ucjpui, which, wo far u we 

 CM* jod9 flMpcOoM ooMtwjr opon % UCTVOU s wccOon of 

 the part. The diieaem which seem to belong to the 

 order Erethism**, and to the germ* Hyperanthcsia, in 

 particnUr, are many of them evidently symptomatic, 



principal object of our rttrntion ; yet occasionally, un- 



tem itaeif become* aMswaMnr the mam point toward* 

 which we are to dUrart our efforts. Thus, one of the 

 in fever i* want of sleep, and 

 the proximate caune of the dis- 

 this sometimes (till continues, and by it* harass- 

 ing effects, prevents the complete re mamiatmniil ot' 

 the health. The saine remarks apply to all thoae affec- 

 tion* which timmtt hi mcreaird sensibility of the or. 

 gan* of sene, each aa a morbidly acute sute of the 

 sight, the hearing, ere. or Jncrinrnd *enii... _> m part* 

 that serve for the exercise of the organic function*, *s 

 the *tnmarh and the kidney. For the meat part we 

 find them connected with *ome more general affection, 

 which chiefly claim* our notice, although, a* we re- 



object* of oMratioa under tbeee fhaaiHaiCM ; and wt 



