Magnetic Materials – 5G00.00 Magnets – 5G10.00 Break a Magnet – 5G10.20 Magnetic Accelerator – 5G10.55 Gauss Rifle – 5G10.80 Magnet Domains and Magnetization – 5G20.00 Compass Arrays – 5D20.30 Paramagnetism and Diamagnetism – 5G30.00 Para/Diamagnetism of Several Samples – 5G30.10 Paramagnetism of Liquid Oxygen – 5G30.20 Hysteresis – 5G40.00 Magnetostriction and Magnetores – 5G45.00 Temperature and Magnetism – 5G50.00 Curie Point – 5G50.15 Meissner Effect (Super Conductivity) – 5G50.50