I am a soft iron bar, which has been magnetized. I keep my polarity, so long as I rem

I am a soft iron bar, which has been magnetized. I keep my polarity, so long as I remain in the same place, but I lose it, when I am moved to another. I can keep it, however, as long as I keep company with other magnets. I can keep it, too, so long as I keep company with a keeper, which is a soft iron bar, which has been magnetized, and which has a keeper, like myself, to keep. I can keep it, too, so long as I keep company with a powerful magnet, which is called a horseshoe. I can keep it, too, so long as I keep company with another powerful magnet, which is called a strong electromagnet. I can keep it, too, so long