Pre-Christmas Give Away - Saturn

[Neil P]

As a practical matter, in order to tell which pole of a magnet is north and which is south, it is not necessary to use the Earth's magnetic field at all. For example, one calibration method would be to compare it to an electromagnet, whose poles can be identified by the right-hand rule.solarwaterheaters.cc

Er.....thanks for those pearls of wisdom.

Neil