( 152 ) 



N. B. — The depth of Rain is ascertained by weighing the water at end of every month, re- , 

 ceived into a close bottle, by a funnel of known diameter, and calculating from thence J 

 the depth in inches by Dalton's formula in his Meteorological Essays. % 



Evaporation is measured by immersing a graduated style into a pewter basin five inches in 

 diameter exposed freely to the air. 



