. ON DEW, &c. 279 



with regard to moisture still permit it, which must often not 

 be the case while dew is forming, will, as the night proceeds, 

 gradually diminish, and at length almost disappear, before 

 the freezing of the water commences; since I have lately 

 shown, that evaporation from water of 32 produces very 

 little cold, even in the day-time. Indeed, it seems to me 

 much more probable, that on a clear and calm night, though 

 in a dry winter of Bengal, water at the temperature of 3$t 

 will acquire warmth from the formation of dew upon it, than 

 that it will become cold from evaporation. 



