Johann Christian Poggendorff, German physicist and journalist (died 1877)

Johann Christian Poggendorff was a German physicist born in Hamburg. By far the greater and more important part of his work related to electricity and magnetism. Poggendorff is known for his electrostatic motor which is analogous to Wilhelm Holtz's electrostatic machine. In 1841 he described the use of the potentiometer for measurement of electrical potentials without current draw.

December 29 is the 363rd day of the year in the Gregorian calendar; two days remain until the end of the year.