Homemade Tangent Galvanometer

At the time Frank Almy began teaching physics at Grinnell College in 1893, the tangent galvanometer was an important part of the equipment of any physics laboratory. This is a tangent galvanometer that Professor Almy made. The date is not known, but it probably was before 1900. The compass in the center is a modern instrument; we do not know what compass Professor Almy used.

em_017

Electricity_and_Magnetism

Galvanometers

Frank F. Almy

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