DISEASES OF SENSATION. SECT. XXXIII. 4, 



accompanied with much coagulable lymph, or fize ; 

 which rifes to the furface of the blood, when taken 

 into a bafon, as it cools ; and which is believed to 

 be the increafed mucous fecretion from the coats of 

 the arteries, infpiffated hy a greater abforption of its 

 aqueous and faline parts, and perhaps changed by 

 its delay in the circulation. 



The typhus fenfuivus, or fenfitive fever with weak 

 pulfe, is frequently attended with delirium, which 

 is caufed by the deficiency of the quantity of fenfo- 

 rial power, and with variety of cutaneous erup* 

 tions. 



Inflammation is caufed by the pains occafioned 

 by excefs of aftion, and not by thofe pains which 

 are occafioned by defect of action, Thefe morbid 

 actions, which are thus produced by two fenforial 

 powers, viz. by irritation and fenfation, fecrete new 

 living fibres, which elongate the old veflels, or form 

 new ones, and at the fame time much heat is evolved 

 from thefe combinations. By the rupture of thefe 

 velfels, or by a new conftruclion of their apertures, 

 purulent matters are fecreted of various kinds ; which 

 are infectious the firft time they are applied to the 

 fkin beneath the cuticle, or fwallowed with the fa- 

 liva into the ftomach. This conragion acts not by 

 its being abforbed into the circulation, but by the 

 fympathies, or aflbciated actions, between the part 

 firft Simulated by the contagious mattsr and the 

 other parts of the fyftem. Thus in the natural 

 fmall-pox the contagion is fwallowed with the faliva, 

 and by its flimulus inflames the ftomach ^ this vari- 

 oloos inflammation of the ftomach increafes every 

 day, like the circle round the pundlure of an ino- 

 culated arm, till it becomes great enough to difordef 

 the circles of irritative and fenfitive motions, and 

 thus produces fever-fits, with ficknefs and vomiting. 

 Laftly, after the cold paroxyfm, or fit of torpor, of 

 the ftomach has increafed for two or three fuccef- 



live 



