What does a bar magnet do?

Steven Gibbs sells a barium oxide bar magnet for the HDR .

The question is: What does a bar magnet do when attached to the electromagnet of the HDR? Well, it appears to increase the strength of the field. I get better results when I use the barium oxide bar magnet that Steven Gibbs sent me.

For some reason getting clocks to move fast is easier when I use both the HDR electromagnet and the barium oxide bar magnet.

Most of the experiments seem to indicate that the strength of the field is important.