Miscellanea Curiosa, 



An Ejiimate of the Quantity of the 

 Valours rat fid out of the Sea de- 

 rived from Experiment : Toge- 

 ther "with an Account of the Cir- 

 culation of the watry Vapours of 

 the Sea j and of the Caufe of 

 Springs, prefented to the Royal 

 Society. 



By Mr. E. Halley, F, R. & 



THAT the Quantity of Aqueous Va* 

 poufs contain'd in the Medium of the 

 Air, is very considerable, Teems moft 

 evident from the great Rains and 

 Snows which are fometimes obferv'd 

 to fall, to that degree, that the Water thus difc 

 charg'd out of the Inter (Vices of the Particles of 

 Air, is in weight a very fenfible part of the in* 

 cumbent Atmofphere : But in what proportion 

 thefe Vapours rife, which are the Sources not 

 only of Rains, but alfo of Springs or Fountains 

 (as I defign to prove) has not, that 1 know of, 

 been any where well examin'd, tho ? it feem Co 

 be one of the moft neceffary Ingredients of a 

 B Real 



