Vegetable Staticks. 55 



ing 1 ounce + 282 grains, gives -fe part of 

 an inch depth for evaporation, which is 

 four times as much as fell at night. 



I found, by the fame means, the evapo- 

 ration of a winter's day to be nearly the 

 fame as in a fummer's day, for the earth 

 being in winter more faturate with moi- 

 fture, that excefs of moifture anfwers to the 

 excefs of heat in fummer. 



Nic. Cruquius, N° 381 of the Philofo- 

 phical Tranfadions, found that 28 inches 

 depth evaporated in a whole year from wa- 

 ter, /. e. T '-j of an inch each day, at a mean 

 rate ; but the earth in a fummer's day evapo- 

 rates -fa of an inch ; fo the evaporation of 

 a furface of water, is to the evaporation of 

 a furface of earth in fummer, as ~j to ^ 



The quantity of Rain which falls in a 

 year is at a medium 22 inches: The quan- 

 tity of the earth's evaporation in a year is 

 at lead 9.15 inches, fince that is the rate, 

 at which it evaporates in a fummer's day : 

 From which 9.15 inches, are to be deduct- 

 ed 3.39 inches for circulating daily Dew; 

 there remain 5.76 inches, which 5.76 inches 

 deducted from the quantity of Rain' which 

 falls in a year, there remain at leaft 16.24 



E 4 inches 



