31. Just as the galvanometer is independent of the physicist, so is the subject from the behaviourist. 32. They had taken the string galvanometer and adapted it to record signals from microphones onto photographic film. 33. Light is metered using a small selenium photovoltaic cell behind a lens array, powering a galvanometer . 34. One problem with the tangent galvanometer is that its resolution degrades at both high currents and low currents. 35. Moving coil galvanometer was developed independently by Marcel Deprez and Jacques-Ars�ne d'Arsonval about 1880. 36. This is despite the use of a highly sensitive mirror galvanometer , a new invention at the time. 37. Forbes reported the replacement of the string galvanometer with a vacuum tube to amplify the EEG in 1920. 38. By tightening or loosening the filament it is possible to very accurately regulate the sensitivity of the galvanometer . 39. To reduce interference from human bodies, the galvanometer was read through a telescope from across the room. 40. The galvanometer is constructed as a number of moving-iron galvanometers, sharing the same excitation coil.
