H A I 



INCHES. 

 Lowest gage f ^^ f ^^^^ fJ ^ ff ^ ff ^ f 22.608 



Middle gage 18.139 



Highest ~~~^ 12.099 



The same result was obtained from the two gages belonging to the 

 Koyal Society, the one placed 75 feet 6 inches above the ground, the other 

 a few feet distant from the other and 11 feet 6 inches lower. 



Mean annual quantity of rain, as shewn by the two gages. 



YEAR. LOWER GAGE ix INCHES. HIGHER. 



1812 ^^^^^ 22.03 18.348 



1813 ,~~ 18.296 15.953 



1814 ^^ 20.723 ~~~~ 16.367 



These facts should be attended to, in order to prevent any inaccurate 

 conclusions from a comparison of different gages. 

 Estimate by Homboldt of the quantity of rain in different latitudes. 



Latitude. Eng. inches. Latitude. Eng. inches. 



GO swvswww 96 45 *~~~w~~~ 29 



19 ro^vwwr** 80 60 ~~~v~w~~ 17 



Professor Leslie has given the following empirical rule for the annual 

 deposit of rain and dew in any latitude. 



Quantity = 75 (1 sin. lat.) -f 8 =r depth in inches. 

 Annual fall of rain at different places y according to Dalton and others. 

 ( Young's Nat. Phil) INCHES. 



Granada, Antilles 126 



Cape Frangois, St Domingo ....... 120 



Calcutta 81 



Bombay 64 



Charlestown 50.9 



Pisa 43.2 



Rome 39.0 



Venice 36.1 



Tadua 34-5 



Zurich 33.1 



Madeira 31.0 



Loyrten 30.2 



