A Natural and Artificial Magnets
B Representation of the Magnetic Field by Lines of Force
C Thermal Demagnetization of Materials
D The Earth's magnet is an Electromagnet
E The Magnetic Field Shields the Earth from Radiation
F Source of the Current in the Electromagnet
G Observed Decay in the Earth's Magnetic Field
H Half-Life of the Earth's Magnet
I The Earth's Magnetic Clock
J Self-Induction Slows the Decay of the Magnetic Field
K Clues to Properties of the Earth's Core
L Present Value of Current in the Earth's Core
M Electric Heating in the Earth's Core
N Vanishing Date for the Earth's Magnetic Field
O Consequences of the Decay of the Magnetic Field
P Initial Value of the Earth's Magnetic Field
Q Origin of the Earth's Magnetic Field
R Weaknesses in the Traditional Reversal Hypothesis
S Origin of the Earth
T References