*9* DISEASES Sect. XXXII. 9. 



4»- 



come ouicfceht from cold. The trembling in confequence of 

 the pain of coldnefs, the reftleflhefs, and the yawning, and 

 flrercning of the limbs, together with the fhuddering, or rigors, 

 are convulfive motions ; and will be explained amongft the dif- 

 eafes of volition \ Seel:. XXXIV. 



Sicknefs and vomiting are a frequent fymptom in the begin- 

 nings of fever-fits, the mufcular fibres of the ftomach fhare the 



*neral torpor and debility of the fyftem ; their motions become 

 firft leffened, and Hop, and then become retrograde; for the aft of 

 vomiting, like the globus hyftericusandthe borborigmi of hvpo- 

 chondriafis*, is always a fymptom of debility, either from want of 

 fttmulus, as in hunger ; or from want of fenforial power, as af- 

 ter intoxication ; or from fympathy with fome other torpid ir- 

 ritative motions, as in the cold fits of ague. See Sect. XII. 5. 

 5. XXIX. 11. and XXXV. 1. 3. where this aft of vomiting is 

 further explained. 



The fmall pulfe, which is faid by forne writers to be flow at 

 the commencement of ague-fits, and which is frequently trem- 

 bling and intermittent, is owing to the quiefcence of the heart 

 and arterial fyftem, and to the refiftance oppofed to the circu- 

 lating fluid from the inactivity of all the glands and capillaries.; 

 The great weaknefs and inability to voluntary motions, with the 

 irrfenfibility of the extremities, are owing to the general quief- 

 cence of the whole moving fyftem ; or, perhaps, limply to the 

 deficient produftioiKcf feniorial power. 



If ail thefe fymptom s are further increafed, the quiefcence of 

 all (he mufcles, including the heart and arteries, becomes com- 

 plete, and death enfues. This is, moft probably, the cafe of 

 thoie who are ftarved to death with cold, and of thofe who are 

 laid to die in Holland from long fkating on their frozen canals. 



1. As foon as this general quiefcence of the fyftem ceafec, 

 ( imer by the diminution of the caufe, or by the accumulation of 

 'ienforial power, (as in fyncope, Sect. XII. 7. 1.) which is the 

 natural confequence of previous quiefcence, the hot fit com- 

 mences. Every gland of the body is now ftimulatcd into 

 ftronger action than is natural, as its irritability is increafed by 

 ac^ lation of feniorial power during its lare quiefcence, a fu- 

 perabun ; the fecretions is produced, and an incrcafe 



of heat in confc nee of the increafe of thefe fecretions. The 

 ft:in becomes red, and the perfpiration great, owing to the in- 



f the capillaries during jhe hot part of the p ar- 

 il, e fecr of perfpirable matter is perhaps greater 

 during the hot fit than in the fweating fit which follows *, but 

 ..bforption of it alio is greater, it does not ftand on the 

 fkin in vifible drops : add to this, that the evaporation of it alfo 



is 



