402 



Miscellanies. 



The. magnetic fluid instantly pervaded the iron bars, producing 

 such an adhesion at b and c that in drawing one bar, the other follow- 

 ed. Two small keys also would remain suspended at a, and d, al- 

 although the magnetism of the bars was stronger at the points of the 

 bars corresponding with the points e and h, of the magnets. 



The needles * and Ic proved that in this position the extremity a 

 had the same magnetism, (north) as the corresponding end e of the 

 magnet e,f, and d the same as h. In moving one of the needles 

 along the two bars, united, I found the neutral point to be nearly at 

 their junction be. 



y 



a 



a 



/M 



AS 



nit 



d 



M 



^M 



f w 



7/7.. 



fn 



im 



ss 



1 



^w 



.M 



But in withdrawing the two magnets in a parallel direction to the 

 two bars, and on removing them entirely the needles i and Zc were 

 rapidly reversed, when the magnets reach the distance of about a 



