of ^agnettfm* 19 



other to the South, it may by a contrary 

 touch of the fame Loaditone be deprived 

 of the faculty it had of directing its de- 

 terminate extreams to determinate Poles. 

 Nay, by another touch (or the fame, and 

 even without immediate Contaft, if the 

 Magnet be vigorous enough) the Needle 

 may prefently have its direction fo chan- 

 ged, that the end, which formerly poin- 

 ted to the North pole, (hall now regard 

 the South, and the other end fhall initead 

 of the Southern, refpeft the Ncrthenpole. 



EXPER. XV. 



AN D to make it the more probable, 

 that the change of the Magnetifm 

 communicated to Iron may be produced 

 at ltaft in good part by Mechanical ope- 

 rations, procuring fome change of texture 

 in the Iron, I (hall fubjoyn a notable Ex- 

 periment of the ingenious Doctor Towtr 7 

 which when I heard of, I tryed as well as 

 I could > and though, perhaps for want of 

 conveniency, I could not make it fully an- 

 fwer what it promifed, yet the fuccefs of 

 the trial was confiderable enough to make 

 it pertinent in thb place, and to induce 

 me to think, it might yet better fucceed 

 with him, whofe Experiment, as far as it 

 concerns my prefent purpofe, imports,that 



if 



