30 ©f t$e gtetfymital flD^tgtne 



Effluvia to faftcn upon ? the edge 

 would manifeftly be drawn afide by 

 the Culhion fteadily held ^ and if 

 this were (lowly removed , would 

 follow it a good way > and when 

 this body no longer detained it, 

 would return to the pofture wherein 

 it had fetded before. And this pow- 

 er of approaching the Gufhion by 

 vertue of the operation of its own 

 fleams^ was fo durable in our vigo- 

 rous piece of Amber> that by once 

 chafing it, I was able to make it fol«> 

 low the Culhion no lefs than ten or 

 eleven times. Whether from fuch 

 Experiments one may argue^ that 'tis 

 bur 5 as 'twere^ by accident that Am^ 

 ber attra&s another body, and not 

 this the Amber } and whether thefe 

 ought to make us queftion^ if Ele- 

 ftricks may with fo much propriety, 

 as has been hitherto generally fuppo- 

 fed, be faid to AttraEf , are doubts 

 that my Defign does not here oblige 

 me to examine. 



Some other Thtiuomena might be 

 added of the fame Tendency with 



thofe 



