Preface. Acknowledgments. Measurements from the Beginning through the Middle Ages. The Beginnings of Experimental Science. The First Rotating Electrostatic Generator. Electric Conductors and Insulators. Vitreous and Resinous Electric Fluid. The Leyden Jar -- The First Capacitor. A Bolt of Lightning Is an Electric Discharge. Early Electrostatic-Measuring Instruments. The First Quantitative Measurements of Electricity and Magnetism. A Carefully Prepared Leg of a Dead Frog Twitches When Stimulated Electrically. Current Electricity Can Be Produced by Chemical Action. An Electric Current Has an Associated Magnetic Field. The Foundations of Electrodynamics. Early Electromagnetic Indicating Instruments. Mathematics Using Harmonically Related Sinusoids. Ohm's Law: X = a/1, E = IR, or I = V/R. Advanced Applications of Mathematics to Measurements and the Development of Many Magnetic and Electrical Measuring Instruments. Acoustics and Electricity Research. Transformations of Electrical and Mechanical Energy. Electromagnetics and Self-Inductance. The Kelvin Scale, Transatlantic Cable, Sensitive Galvanometers, and Electrometers. Electromagnetic Radiation. The Beginnings of Radio. The Story of a Successful Electrical Instrument Manufacturer. The Discovery of the Electron, Part I. The Discovery of the Electron, Part II: Verifying JJ Thomson's Results and Developments Leading into the Twentieth Century. Appendix: Photo Section. Index. About the Author.