Johann Christian Poggendorf, German physicist, mid 19th century.

 
Johann Christian Poggendorf, German physicist, mid 19th century.
4 0 c m
 
27cm
actual image size: 19cm x 32cm

Description

Engraving taken from the 'Jubelband of Poggendorf's Cunnalen der Physik und Chemie, 1874' of Johann Christian Poggendorf (1796-1877). Poggendorf discovered that the difference in potential of two conductors may be measured by balancing it against a known difference of potential such as that of a voltaic cell.

© Science Museum / Science & Society Picture Library

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