Gottlieb Coradi
1847 - 1929
Gottlieb Coradi (1847–1929) established a workshop in Zurich in 1880 and began making wheel and disc polar planimeters in the Amsler style soon thereafter. In 1894, he designed the compensating polar planimeter, and by 1900, his firm was selling a precision rolling planimeter.
Terms
"Instruction Manual for Coradi Planimeters," National Museum of American History, http://americanhistory.si.edu/collections/search/object/nmah_904761 (accessed 09/05/2014)
An early twentieth-century catalogue of instruments and other information about this firm is found at G.cordi.com. http://www.g.coradi.com/ (accessed 09/05/2014)