The Early History -- The Early History -- Fundamentals -- The Maxwell Equations -- Electric Fields -- Constant Magnetic Fields -- Time-dependent Magnetic Fields: The Law of Faraday -- Moving Conductors -- Ohm’s Law for Moving Conductors -- Charges Inside Moving Conductors -- Nine Examples: Magnetic Fields in Moving Conductors -- Case Study: The Azimuthal Magnetic Field in the Earth’s Core -- Natural Dynamos -- Case Study: The Disk Dynamo Model for Natural Dynamos -- Three Case Studies: Magnetic Flux Tubes, Flux Ropes, and Flux Coils -- Case Study: Solar Magnetic Elements -- Case Study: Sunspots -- Case Study: Solar Spicules -- Case Study: Solar Coronal Loops as Self-Channeled Proton Beams I -- Case Study: Solar Coronal Loops as Self-Channeled Proton Beams II -- Appendices -- Characteristic Lengths and Times, a Justification1 -- SI prefixes.