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 from water of the Seine, and of the! 

 aqueduct of Arcueil, an air better 

 than common air, which was a itep 

 towards the difcovery of Hill better 

 air from flmple water, by fome other 

 way not yet hit upon. Thefe in- 

 teresting experiments are printed in 

 the Journal de Phyfique de I' Abbe 

 Rojier, May 1 7 79. 



SECTION XXVlh 



On the nature of the air oozing out 

 of our Jkin, 



AS our bodies perfpire continu- 

 ally a watery liquid, either in an 

 invisible way by what is called in-* 

 fenfible perfpiration, pr by way of 

 K fweat* 



