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In 1826, Poggendorff developed the mirror galvanometer, a device for detecting electric currents. He had an extraordinary memory, well stored with scientific knowledge, both modern and historical, a cool and impartial judgment, and a strong preference for facts as against theory of the speculative kind.
A mirror galvanometer is an ammeter that indicates it has sensed an electric current by deflecting a light beam with a mirror. The beam of light projected on a scale acts as a long massless pointer. In 1826, Johann Christian Poggendorff developed the mirror galvanometer for detecting electric currents. The apparatus is also known as a spot ...
Mirror galvanometer by James W. Queen & Company Cascade above the Basin, Franconia Mountains, N.H, by James W. Queen & Company. James W. Queen & Company was an optical and scientific instrument company located at 924 Chestnut Street, Philadelphia, Pennsylvania, with a branch office in New York City, and active in various forms from 1853 to 1925, and subsequently as Gray Instrument Company ...
Download as PDF; Printable version ... technique of electrical images, ... insufficiently sensitive and had to be replaced by Thomson's mirror galvanometer ...
Download as PDF; Printable version; In other projects ... Template from Crick and Watson’s DNA molecular model, 1953 ... c 1953. Thomson's mirror galvanometer, 1858 ...
Meghan Markle's decision to pull her new lifestyle series in lieu of the California fires was met with animosity online but received praise by royal watchers.. Two days before "With Love, Meghan ...
According to the New York Times, here's exactly how to play Strands: Find theme words to fill the board. Theme words stay highlighted in blue when found.
Galvanometer mechanisms were also used to get readings from photoresistors in the metering mechanisms of film cameras (as seen in the adjacent image). In analog strip chart recorders such as used in electrocardiographs , electroencephalographs and polygraphs , galvanometer mechanisms were used to position the pen .