John Kells Ingram was an Irish mathematician, economist and poet who started his career as a mathematician. He has been co-credited, along with John William Stubbs, with introducing the geometric concept of inversion in a circle. Wikipedia
Born: July 7, 1823, County Donegal, Ireland
Died: May 1, 1907 (age 83 years), Dublin, Ireland
Books
A History of Political Economy
1888
Considerations on the State of Ireland: Being the Substance of an Address ... Second Edition, Etc
1864
The Present Position and Prospects of Political Economy, Being the Introductory Address Delivered in the Section of Economic Science and Statistics of the British Association for the Advancement of Science, at It's Meeting at Dublin In 1878
The Final Transition: A Sociological Study
1905
Sonnets and Other Poems
1900
Hermathena
1873