of$JagnettCm* I 



EX PER. VII. 



WE elfewhere obferve, which 

 perhaps you alfo may have 

 done, that the Iron bars of windows, 

 by having ftood very long in an 

 ere&ed pofture, may at length grow 

 Magnetical, fo that, if you apply the 

 North point of a poifed and exci- 

 ted Needle to the bottom of the 

 Bar, it will drive it away, &attra& 

 the Southern 5 and if you raife the 

 magnetick needle to the upper part 

 of the Bar, and apply it as before, 

 this will draw the Northern extream 3 

 which the other end of the bar ex- 

 pelled 5 probably becaufe , as 'tis 

 elfewhere declared, the bar is intraft 

 of time, by the continual adion of 

 the Magnetical effluvia of the Tar- 

 raqueous Glohe, turned into a kind 

 of Magnet, whofe lower end becomes 

 the North-pole of it, and the other 

 the Southern* Therefore accor- 

 ding to the Magnetical Laws, the 

 former muft expel the Northern ex- 



tream 



