How Do I Check the Polarity of a Magnet?

[Evastar]

Anyone know how i check which side of a magnet is north and which is south?

I have checked wikipedia but it doesn't say.

[bottle]

hang it by a thread , north points north

[caveman_nige]

YouTube - AMC Magnet Polarity Test

[Evastar]

Thanks everyone, i found this on ebay so have ordered one:

Magnetic Pole Finder- Searcher, magnet neodymium on eBay (end time 29-Aug-09 22:36:50 BST)