In the early days of electrical research a common method of detecting electric current was by means of a frog's leg
galvanoscope for which
Kaynak: Frog batteryGlossary of types of viewing instrument :
galvanoscope gastroscope gonioscope iconoscope kaleidoscope kinescope kinetoscope laryngoscope
Kaynak: Viewing instrumentA supply of frogs was usually on hand, as they were used in the frog
galvanoscope . The electromagnetic galvanometer was available at the
Kaynak: Golding BirdThe telegraph receiver used in the trial was a
galvanoscope of Dr. O'Shaughnessy's design and manufactured in India. When the experiment
Kaynak: Company rule in India