Keywords: Edward Troughton.jpeg en Portrait of British mathematician Edward Troughton 1753-1835 before 1835 MacTutor History of Mathematics http //turnbull mcs st-and ac uk/~history/PictDisplay/Troughton html author other versions Custom license marker 2015 08 08 pd-old-100 Uploaded with UploadWizard Edward Troughton 1753 births 1835 deaths |