$ra DISEASES OF ASSOCIATION. SECT. XXXV. 2. 



fenfitive aflbciation ceafes, when that of the fecon- 

 dary part commences, are alfo n.ot unfrequent ; as 

 this is the ufual manner of the tranflation of in* 

 flammations from internal to external parts of the 

 fyftem, fuch as when an inflammation of the liver 

 or ftomach is tranflated to the membranes of the 

 foot, and forms the gout ; or to the (kin of the 

 face, and forms the rofy drop ; or when an inflam- 

 mation of the membranes of the kidneys is tranf- 

 lated to the ikin of the loins, and forms one kind 

 of herpes, called (hingles ; in thefe cafes, by whate- 

 ver caufe the original inflammation may have been 

 produced, as the fecondary part of the train of fen. 

 iitive aflbciation is more fenfible, it becomes ex- 

 erted with greater violence than the firft part of it j 

 and by both its increafed pain, and the increafed 

 motion of its fibres, fo far diminifhes or exhaufts 

 the fenforial power of fenfation, that the primary 

 part of the train being lefs fenfible ceafes both to 

 feel pain, and to aft with unnatural energy. 



3. Examples of the third mode, where the pri- 

 mary part of a train of fenfitive aflbciation of mo* 

 lions may experience increafed fenfaiion, and the 

 fecondary parr increafed action, are likewife not un- 

 frequent ; as it is in this manner that moil inflam- 

 mations commence. Thus, after ftanding fome time 

 in fnow, the feet become affected with the pain of 

 cold, and a common coryza, or inflammation of the 

 membrane of the noftrik, fucceeds. It is probable 

 that the internal inflammations, as pleurifies, or he- 

 patitis, which are produced after the cold paroxyfm 

 of fever, originate in the fame manner from the 

 Sympathy of .thof$ parts with fome others, which 

 were previoufly pained from quiefcence ; as hap- 

 pens to various parts of the fyftem during the cold 

 fits of fevers. In thefe cafes it would feem, that 

 the fenforial power of fenfation becomes accumu- 

 lated during the pain of cold, as the torpor of the 



veffeli 



