[ 5^1 



J 



Thi's we fee how obfervations duly made might be analyfed, 

 and the general refult calculated a priori. 



It deferves alfo to be remarked, that though Sauffure never' 

 found the air in Switizerland drier fhan XL and frequently at 

 XCV. or even faturated, yet Achard, at Berlin, during the years 

 1788 and 1799, never found it moifter than LXX. generally 

 between L. and LX. and frequently at XL. and once even at 

 XXXII. Berlin ftands on a fandy foil. The mean height of the 

 barometer is 29,84 inches, and confequently its height over the 

 level of the fea is about one hundred and forty feet, its diflance 

 from the Baltic one hundred and twenty miles, whereas Geneva 

 ftands on the border of a great lake. The mean height of the 

 barometer is 28,77 inches, and confequently one thoufmd and 

 ninety-one feet above the level of the fea, (others deem it one 

 thoufand two hundred and twenty) and about two hundred -and 

 twenty-five miles diftant from the Mediterranean. The air in 

 mountainous countries is known to be much moifter than that 

 over flat countries. 



During the feven laft months of the year 1785, and the feven 

 firft months of 1786, I made daily obfervations, and never found 

 the hygrometer to ftand lower than LXV. apd ,that was on the 

 azd -of April 1785, barometer 29,97, thermometer 56°, wind 



Vol, VIII. Rr NW,. 



