I $f i\)t fj$zt\)mm\ engine 



perhaps in fome cafes affifted in' its 

 Operation by ihe external air.) feems 

 agreable to divers things that may 

 be obferv'd in fuch Bodies and their 

 manner of afting. 



There are differing Hypothefes 

 ( and all of them Mechanical, pro- 

 pos'd by the Moderns ) to folve the 

 Phenomena of Eleftrical Attra&ion. 

 Of thefe Opinions the Firft is that 

 of the learned Jefuite Cab£us> who, 

 though a Peripatetick and Commen- 

 tator on Ariftotk) thinks t\\% draw- 

 ing pf light Bpdies by Jet, ^mber, 

 &c.may be accounted for,by fuppo w 

 ling, that the fteams that iflue, or, if 

 I may fo fpeak, fally, out of Amber-, 

 when heated by rubbing, difcufs an$ 

 expell the neighbouring air 5 which 

 after it has deen driven off a little 

 way s makes as it were a fmall whirl- 

 wind , becaufe of the refiftance it 

 finds from the remoter air , which 

 has cot been wrought on by the E- 

 le&rical Steams 5 and that thefe* 

 Ihrinking back fwiftly enough to the 

 Amber, do in their returns bring a- 



loog 



