3 22 DISEASES Sect. XXXIII. 4. 1. 



pulfe, it is termed typhus fenfitivus, or fenfitive fever with weak 

 pulfe, or typhus gravior, or putrid malignant fever. 



The fynocha fenfitiva, or fenfitive fever with ftrong pulfe, is 

 generally attended with fome topical inflammation, as in perip- 

 neumony, hepatitis, and is accompanied with much coagulable 

 lymph, or fize •, which rifes to the furface of the blood, when 

 taken into a bafin, as it cools ; and which is believed to be the 

 increafed mucous fecretion from the coats of the arteries, infpif- 

 fated by a greater abforption of its aqueous and faline part, and 

 perhaps changed by its delay in the circulation. 



The typhus fenfitivus, or fenfitive fever with weak pulfe, is 

 frequently attended with delirium, which is caufed by the de- 

 ficiency of the quantity of fenforial power, and with variety of 

 cutaneous eruptions. 



Inflammation is caufed by the pains occafioned by excefs of 

 action, 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 vefiels, or form new ones> 

 and at the fame time much heat is evolved from thefe combina- 

 tions. By the rupture of thefe verTels, or by a new conftruction 

 of their apertures, purulent matters are fecreted of various kinds ; 

 which are infectious the firlt time they are applied to the fkin 

 beneath the cuticle, or fwallowed with the faliva into the ftom- 

 ach. This contagion acts not by its being abforbed into the 

 circulation, but by the fympathies, or aflbciated actions, between 

 the part firft ftimulated by the contagious matter and the other 

 parts of the fyftem. Thus in the natural fmall-pox the conta- 

 gion is fwallowed with the faliva, and by its ftimulus inflames the 

 ftomach ; this variolous inflammation of the itomach increafes 

 every day, like the circle round the puncture of an inoculated 

 arm, till it becomes great enough to diforder the circles of irrita- 

 tive and fenfitive motions, and thus produces fever-fits, with 

 ficknefs and vomiting. Laftly, after the cold paroxyfm, or fit 

 of torpor, of fche ftomach has increafed for two or three fuccef- 

 five days, an inflammation of the fkin commences in points *, 

 which generally firft appear upon the face, as the aflbciated ac- 

 tions between the fkin of the face and that of the ftomach have 

 been more frequently exerted together than thofe of any other 

 parts of the external furface. 



Contagious matters, as thofe of the meafles and fmall-pox, do 

 not act upon the fyftem at the fame time ; but the progrefs of 

 that which was laft received is delayed, till the action of the for- 

 mer infection ceafes. All kinds of matter, even that from com- 

 mon, ulcers, are probably contagious the firft time they arc in- 



ferted 



