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fweat, fo a quantity of air feems 

 to ifTue continually from the pores 

 of our fkin. This is eafily to be 

 obferved in a cold or warm bath, 

 in which we may clearly fee whole 

 bubbles of this air rifing upon the 

 fkin, and at laft rife to the top of 

 the water. By plunging the hand 

 and arm even in cold water, we 

 may immediately obferve a large 

 number of thofe bubbles every 

 where : and they are the more ap- 

 parent when the fkin is thoroughly 

 dry before the part is plunged in- 

 to the water ; and much more fo 

 when it is plunged precipitately in- 

 to it. 



It is however to be obferved, that 

 all the air contained in thofe bub- 

 bles, which appear upon the fkin, 

 when a part of our body thoroughly 

 dry is on a fudden plunged under 



the 



