6 0ft|)e^et^anwal^ol)uatoh 



EX PER. IV. 



TO (hew that the virtue that a 

 Loadftone hath by this deter- 

 minate Pole or Extream toattraft, 

 for example, the South-end of a poi- 

 fed needle j and with the oppofite 

 extream or Pole the North-end of 

 the fame needle* I made among other 

 tryals the following Experiment. 



Taking a very fmall fragment of 

 a Loadftone, I found, agreeably to 

 my cooje&ure ^ that by applying 

 fometim^s one Pole, fometimes the 

 other, to that pole of (a fmall but) a 

 very vigorous Loadftone that was 

 fit for my purpofe, I could at plea- 

 fure, io a few minutes, change the 

 Poles of the little fragment, as I 

 tryed by its operations upon a needle 

 freely poifed 5 though by applying 

 a fragment a preuydeal bigger, (for 

 in it felf it appeared very fmall,) I 

 was not able in far more hours than 

 I employed minutes before, to make 

 any fenfible change of the Pole*. 



This 



