Slale of Vapour fuhjtjling In the Atmofphere. I51 



pole: it feems onlv lo appear that Churchman's hypothefis 

 correfponds vcrv I'iule with the obfcrvations which I hav-e 

 calculated, and that the northern magnetic pole lies on the 

 north-weft coaft of Bafiin's Bay, nearly where the entrance 

 of Alderman Jones is to be fought for oi\ Buache's chart of 

 178a, and where Ferrer Maldonado touched in 1598, ac- 

 cording to a Spanilh memoir read fome years ago m the 

 Academy of Sciences j which, however, feems to defcrvc 

 verv little credit. 



XXXIX. Of the State of Vapour fubftjUtig in the Atfnfphere, 

 % Richard Kirwan, Ejq. F.R.S. and F.R.'LA. 



[Concluded from p. 143.. 1 



i HE dilatation of the moifture contained in the air has 

 been feparatciv examined by Mr. Schmidt, and he has fliowa 

 how from it the volume of air fatur-ited with moilturc, latu- 

 rated, I fav, at everv degree of Keaumur, may be difcovered : 

 the refuUs of his experiments appear in the following table of 

 the volume which ^ooomeafures at 32° of air would acquire 

 \i fatiirated luith motjlure at each degree of Reaumur above 

 32°, expreHcd on Fahrenheit's fcale *. 



• To prevent miflakcs, it muft he noted that this table is not meant to 

 cxprcfs the dilatations of air I'aturated at any particuhir degree of heat it 

 tvc.-jld acquire at other fiiperior degrees, but only the bulk tliar 1000 p^rtt 

 dry air at 34° would acijuirc i)y luturaiiuu at each hijjhcr degree. 



hoie. 



