14 S>f tfte ^et^anttal J&oDuttion 



the Iron, whilft it was yet foft, and 

 had its pores more lax, and parts 

 more pliable, difpofed it, I fay, to re- 

 ceive much quicker impreflions from 

 the Magnetical effluvia of the Earth, 

 than it would have done, if it had 



ftill been cold. 

 E X P E R. X. And 'tis very ob- 



fervable to our 

 prefent purpofe, what differing ef- 

 fects are produced by the operation 

 of the fire, upon two Magnetick bo- 

 dies according to their refpe&ive 

 constitutions. For , by keeping a 

 Loadftone red-hot, though you cool 

 it afterwards in a perpendicular po- 

 fture, you may deprive it of its for- 

 mer power of manifeftly attra&ing : 

 But a bar of Iron being ignited, and 

 fet to cool perpendicularly , does 

 thereby acquire a manifeft verticity. 

 Of which differing events I muft not 

 now ftay to inquire, whether or no 

 the true reafon be, That the peculiar 

 Texture or internal conftitutionthat 

 makes a Loadftone fomewhat more 

 than an ordinary Ore of Iron,(which 



metal, 



