| Authorised form of name | Backlund; Jons Oskar (1846 - 1916) |
| Other forms of name | Johann Oscar |
| Dates | 1846 - 1916 |
| Place of birth | Langhem, Sweden |
| Date of birth | 28 April 1846 |
| Place of death | Pulkovo, Russia |
| Date of death | 29/08/1916 |
| Membership category | Foreign Member |
| Date of election | 09/11/1911 |
| Sources | Sources:
Bulloch's Roll; DSB
Obituaries:
Proc Roy Soc Series A 1917-1918 vol 94 pp xx-xxiv signed by H H T |
| Royal Society code | NA169 |
Archives associated with this Fellow
| Reference number | Title | Date |
| EC/1911/19 | Backlund, Jons Oskar: certificate of election to the Royal Society | |
| NLB/46/89 | Copy letter from Robert William Frederick Harrison, to Professor Oskar Backlund, Foreign Member of the Royal Society | 7 June 1912 |
| MC/27/8 | Letter from [Jons Oskar] Backlund, Observatoire Central Nicolas, Poulkovo Goverment de St. Petersbourg, Cabinet du Directeur, to [Robert] Harrison, The Secretary of the Royal Society | 15 May 1912 |
| NLB/47/655 | Copy letter from Robert William Frederick Harrison to Dr [Jons] O [Oskar] Backlund For.Mem.RS, Academie Imperiale des Sciences, St Petersburg | 10 March 1913 |
| MC/26/11 | Letter from [Jons Oskar] Backlund, Pulkovo, [Russia], to Sir Joseph [Larmor], the [Royal Society] | 25 November 1911 |