Editing Planimeter (section)

=== Sources ===
{{Refbegin}}
* {{Citation |first1=John |last1=Bryant |first2=Chris |last2=Sangwin |chapter-url=https://books.google.com/books?id=iIN_2WjBH1cC&pg=PA138 |title=How Round is your Circle?: Where Engineering and Mathematics Meet|title-link=How Round Is Your Circle |chapter=Chapter 8: In pursuit of coat-hangers|pages=138–171 |publisher=Princeton University Press |year=2007 |isbn=978-0-691-13118-4 }}
* {{Citation |first=R. W. |last=Gatterdam |title=The planimeter as an example of Green's theorem |journal= The American Mathematical Monthly|volume=88 |year=1981 |issue=9 |pages=701–704 |doi= 10.2307/2320679|jstor=2320679 }}
* {{Citation |first=John L. |last=Hodgson |title=Integration of flow meter diagrams |journal= Journal of Scientific Instruments|volume=6 |issue=4 |date=1 April 1929 |pages=116–118 |doi=10.1088/0950-7671/6/4/302 |bibcode=1929JScI....6..116H }}
* {{Citation |first=E. M. |last=Horsburgh |url=https://archive.org/details/moderninstrument00horsuoft |title=Napier Tercentenary Celebration: Handbook of the Exhibition of Napier Relics and of Books, Instruments, and Devices for facilitating Calculation |publisher=The Royal Society of Edinburgh |year=1914 }}
* {{Citation |first=G. |last=Jennings |title=Modern Geometry with Applications |publisher=Springer |year=1985 }}
* {{Citation |first=L. I. |last=Lowell |title=Comments on the polar planimeter |journal= The American Mathematical Monthly|volume=61 |year=1954 |issue=7 |pages=467–469 |doi= 10.2307/2308082|jstor=2308082 }}
* {{Citation |first=J. Y. |last=Wheatley |url=https://books.google.com/books?id=yUJDAAAAIAAJ&pg=PA1 |title=The polar planimeter |location=New York |publisher=Keuffel & Esser |year=1908 |isbn=9785878586351 }}
{{Refend}}