go flDf t|>e ^et^anttal J)^tfitne 



for Ele#rical Experiments, I afterwards 

 repeated the Trial , and found , that in 

 warm Weather it would retain a manifeft 

 power of attia&ing for feverah minutes 

 C for it ftirred a pois'd Needle after above 

 | of an hour ) after we had done rubbing 

 it. Upon which encouragement we fuf* 

 pended it, being firfi well chafed, in a 

 Glafs Receiver that was not great, j aft over 

 alight Body * and making hafte with our 

 Air- Pump to exhauft the Glafs, when the 

 Air was withdrawn, we did by a Contri- 

 vance let down the fufpendedAmber till i( 

 came very near the Straw or Feather, and 

 perceived, as we expe&ed> that in fome 

 Trials, upon the lcaft Contadt it would lift 

 it up i and in others, for we repeated the 

 Experiment , the Amber would raife it 

 without touching it, that is, would attract 

 it- 



You will probably be the lefs 

 difpos*d to believe , That Eledricdl 

 Attractions muft proceed from the 

 Substantial Forms of the Attrahents, 

 or rom the Predominancy of this or 

 that Chymical Principle id them, if I 

 acquaint you with fome odd Trials 

 wherein the Attra&ion of light Ed- 

 dies 



