Electricity and Magnetism

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In the early years of the 20th century, a very important part of laboratory work in physics was electrical measurements, and that fact is reflected in the large number of electrical standards and measuring devices such as bridges in the physics museum collection. Electrical current was detected and measured by galvanometers, and making more sensitive galvanometers was an important goal of instrument makers.

Kelvin's Astatic Galvanometer	Simple Astatic Galvanometer No. 1
Thomson's Mirror Galvanometer	Simple Astatic Galvanometer No. 2
Ballistic Galvanometer	Decade Bridge
Bohnenberger Electroscope	Demonstration Electric Motor
Homemade Galvanometer	Electric Egg
Homemade Tangent Galvanometer	Induction Coil with Interrupter
Epinus Condenser	Helixon Stand
Kohlrausch wire	Lamp with Scale
One Ohm Standard with Thermometer	" One True Ohm"
One-Third Microfarad Capacitor	Post Office Bridge Without Meter
Post Office Bridge with Meter	Hand-driven Generator
Standard Cell with Thermometer	Standard Resistor with Mercury Cups
Tangent Galvanometer	Two Standard Inductors
Variable Standard of Self-Inductance