of jptgnettfm* ut 



(ince length of time is requifite to 

 make the verticity of a bar of Iron 

 fo durable & conftant, that the fame 

 extream will have the fame virtues in 

 reference to the Magnetical needle, 

 whether you make it the upper end 

 or the lower end of the bar, it feems 

 not improbable to me, that by 

 length of time the whole Magnetick 

 virtue of this Iron may be increafed, 

 and confequently fbme degree of at- 

 tra&ion acquired. 



And by this Confideration I (hall 



endeavour to explicate that ftrange 



thing, that is reported by fome 



Moderns to have happened in Italy, 



where a bar of Iron is affirmed to 



have been converted into a Load- 



ftone whereof a piece was kept a- 



raong other rarities in the curious 



Aldrovandm his Mufaum Metallicum 



For considering thegreataefsof its 



Specific Gravity, the malleablenefs 



and other properties, wherein Iron 



differs from Loadftoneyl cannot eafi- 



!y believe, that, by fuch a way as is 



mentioned) a metal (hould be turned 



into 



