EXPERIMENTS upon MAGNETISM. 325 



time, that each of the filings, even the fmalleft, becomes 

 itfelf a magnet, fo foon as it arrives within a fhort diftance 

 of its attradling pole. This is particularly evinced by 

 thofe particles vv^hich are firft put in motion, and which 

 occupy the neareft flations. For, immediately upon their 

 arrival at a certain dlftance, they turn round, and prefent 

 to the magnet their oppofite extremity. 



EXPERIMENT 2. 



Place two diflimilar ends of magnets about an inch apart, 

 in a large diili ; let them be juft covered with water ; fift 

 the filings between the ends. The particles of iron are 

 immediately attradled by the neareft pole ; they move 

 quickly in oppofite direftions, occupy the neareft ftation 

 they can, become themfelves magnetic, and prefent to 

 each other diflimilar poles. The particles attracted by the 

 poles of the magnets thus mutually attra£t each other. 

 Between the poles of the large magnets, the filings are 

 arranged in ftraight lines ; becaufe there, they tend direft- 

 ly to the attracting points ; the more removed, the more 

 curvilineal their pofition ; becaufe each particle making 

 the fame effort to occupy the neareft flation to the centre 

 of attraction, they are all neceflarily forced into a pofition 

 correfponding with that effort. 



EXPERIMENT 3. 



Place fimilar ends of two magnets, as the diffimilar were 

 fituated in the laft experiment, and fift the filings between 

 them. Here alio, you fee them to be ad:ed upon by at- 

 trad;ion as before ; they move to the neareft pole, become 

 magnetic, and prefent to each other fimilar poles ; that is, 

 fuppofing the north poles of two magnets to be oppofed, 

 all thofe filings which are attracted by the north pole of 

 one of the magnets, prefeat a north pole to the north 



pole 



