Electricity and Magnetism "Mutual Repulsion of Electrified Threads" A manufacturer of suspenders noticed that the rubber threads used in that process sometimes repelled each other. The illustration shows a bundle of rubber strips being charged by feather dusters. The room is in the Scientific American office.               Experimental Science, George M. Hopkins, 1890, Munn & Co.

5A-Electrostatics
10. Producing Static Charge
20. Coulomb's Law
22. Electrostatic Meters
30. Conductors and Insulators
40. Induced Charge
50. Electrostatic Machines
5B-Electric Fields and Potential
10. Electric Fields
20. Gauss' Law
30. Electrostatic Potential
5C-Capacitance
10. Capacitors
20. Dielectric
30. Energy Stored in a Capacitor
5D-Resistance
10. Resistance Characteristics
20. Resistivity and Temperature
30. Conduction in Solutions
40. Conduction in Gases
5E-Electromotive Force and Current
20. Electrolysis
30. Plating
40. Cells and Batteries
50. Thermoelectricity
60. Piezoelectricity
5F-DC Circuits
10. Ohm's Law
15. Power and Energy
20. Circuit Analysis
30. RC Circuits
40. Instruments
5G-Magnetic Materials
10. Magnets
20. Magnet Domains and Magnetization
30. Paramagnetism and Diamagnetism
40. Hysteresis
45. Magnetostriction and Magnetores
50. Temperature and Magnetism
5H-Magnetic Fields and Forces
10. Magnetic Fields
15. Fields and Currents
20. Forces on Magnets
25. Magnet/Electromagnet Interaction
30. Force on Moving Charges
40. Force on Current CarryingWires
50. Torque on Coils
5J-Inductance
10. Self Inductance
20. LR Circuits
30. RLC Circuits - DC
5K-Electromagnetic Induction
10. Induced Currents and Forces
20. Eddy Currents
30. Transformers
40. Motors and Generators
5L-AC Circuits
10. Impedance
20. LCR circuits - AC
30. Filters and Rectifiers
5M-Semiconductors and Tubes
10. Semiconductors
20. Tubes
5N-Electromagnetic Radiation
10. Transmission Lines and Antennas
20. Tesla Coil
30. Electromagnetic Spectrum