dies feem'd to depend upon very 

 ftnall circumftances. And though 

 forbearing at prefent, to offer you 

 my thoughts about the caufe of thefc 

 furprifing Vhmomma, I propofe it 

 onely as a Probleme to your felf and 

 your curious Friends, yet the main 

 circumftances feeming to be of a Me- 

 chanical Nature , the recital of my 

 Trials will not be impertinent to the 

 Defign and Subjeft of this Paper. 



EX PER. vir. 



I Took then a large and vigorous 

 piece of Amber conveniently fha- 

 ped for my purpofe, and a downy 

 feather, fuch as grows upon the Bo- 

 dies, not Wings or Tails of a fome- 

 what large Chicken: Then having 

 moderately excited the Ele&rick, I 

 held the Amber fo near it, that the 

 neighbouring part of the feather was 

 drawn by it and ftuck faft to it i but 

 the remoter parts continued in their 

 former pofture. This done, I apply- 

 ed my fore-finger to thefe ere&ed 

 C downy 



