Chap. 4. Pomr of the SllNy &"€. 135 



Pulfion. Of this Bernoulli m his Book 

 De Gravitate jEtheris^ Printed at Amfierdam 

 in %vo. in the Year 1683, gives a particular 

 Account. 



However, the word is ftill -us'd by good 

 NaturaHfts, and in particular by the Inge- 

 nious Sir Ifaac Nexvton^ in his Priiicipia^ Sec. 

 Tho' in all his Writings he ufes it in a Ma- 

 thematical, rather than a Phylical Sence, 



But to apply particularly to the Cafe in 

 hand : When the Surface of the Sea, &c. 

 is divided by the Heat of the Sun, and the 

 Power of the Air, their Afcenfion through 

 the if\tmofphere either through the Rarefadion 

 of the Air by the Sun, (as is the Cafe in a 

 warm ferene Day) by which means thofe 

 Particles mount, probably, by the attraSive 

 Power of the Sun, ( in the fame manner as 

 the inconceivable Power of the Loadftone 

 attrads Bodies to it felf ) or otherwife by the 

 Refpiration of this Terraqueous Globe, 

 which in this cafe may be fuppos'd to ad like 

 the Body Natural 5 or elfe that the Air being 

 rarefied by the Beams of the Sun, as above 

 mentioned, does by the Gravitation of its 

 own Body in general, ( fince Quantity will 

 over-balance Quality ) by Pulfion , force 

 thofe humid Vapours upwards through thofe 

 Beams or Rays of Light, which are as fo 

 many Tubes or Pipes for their eafie Palfage, 

 Afcefion, and Conveyance : Or otherwife, 

 if thefe Vapours are conveyed by the Undu^ 

 lation of the Air, in a Perpendicular rather 



K 4 than 



