130 H^majlatics. 
the fame time poured thro’ the Tunnel into 
the Arteries, thofe capillary Arteries would 
on a fudden be fo contrafted, as that the fourth 
Pot of cold Water was So'' longer in palling 
thro’ than the like Quantity of warm Water 
was juft before : And the fifth Pot being warm 
Water, and the Guts at the fame time being 
warmed by Water poured on them, it pafled in | 
77'' fooner than the former Pot of cold Wa- 
ter did. 
. 10. Hence we plainly fee how greatly Heat 
and Cold dilate and concrad our Pores, which 
muft therefore confequently have a proportU 
onable EfFed on our Perfpiration, that great 
and important Evacuation: Thus hot Baths 
greatly increafe Perfpiration, but a cold damp 
Air, and cold North-eafterly Winds, by con- 
ftringing the Pores retard Perfpiration, notwith- 
Handing there is no Abatement of the internal 1 
Heat : And on the other hand, when the Blood 
is cold, as in Dropfies, the Perfpiration will be 
much rebated for want of a due internal Hear, 
notwithftanding the Pores may be relaxed: 
yet in a burning Fever, when by reafon of its 
great Heat, the Pores fliould be open, there is 
notwithftanding very little Perfpiration ; this 
as well as the other glandular Secretions being 
greatly 
