I found the compass turn around-and-around, it is used to be the earth-magnet-square’s job, this is a power around earth, and I found when you put a magnet on the compass, it point in the wrong way, that is magnet-power, magnet has power. I like to tell：there is nothing important then obsove (than observe).
这是他今天做完实验自己在电脑上记的my theory,我一个字或者标点没改，就最后那个括号怕大家看不明白标一下。虽然错误随处可见，但也是科普男的理论笔记，所以贴一下。
