S. L. Loney


Sydney Luxton Loney, M.A. (16 March 1860 – 16 May 1939) was a Professor of Mathematics at the Royal Holloway College, Egham, Surrey, and a fellow of Sidney Sussex College, Cambridge, England.[1] He authored a number of mathematics texts, some of which have been reprinted numerous times. He is known as an early influence on Srinivasa Ramanujan.[2]

S. L. Loney
Sydney Loney.jpg
Born(1860-03-16)March 16, 1860
Chevithorne, Devon, England
DiedMay 16, 1939(1939-05-16) (aged 79)
Alma materSidney Sussex College, Cambridge
OccupationProfessor, author
OrganizationRoyal Holloway College

Loney was educated at Maidstone Grammar School, in Tonbridge and at Sidney Sussex College, Cambridge, where he graduated with a B.A. as 3rd Wrangler in 1882.[3] His books on Plane Trigonometry and Coordinate Geometry are very popular among senior high school students in India who are preparing for engineering entrance exams like JEE Advanced.[4]


  • Loney, SL (1889), A treatise on elementary dynamics, Cambridge: University Press, JFM 21.0845.01
  • Loney, SL (1893), "Mechanics and hydrostatics for beginners", Nature, Cambridge: University Press, 47 (1219): 437, Bibcode:1893Natur..47..437G, doi:10.1038/047437b0, JFM 25.1331.02, S2CID 3983398
  • Loney, SL (1895), The elements of coordinate geometry, London: Macmillan and Co., JFM 26.0640.01
  • Loney, SL (1897), The elements of statics and dynamics, Cambridge: University Press, JFM 23.0903.08
  • Loney, SL (1903), A Shilling Arithmetic, London: Macmillan and Co.
  • Loney, SL (1909), An elementary treatise on the dynamics of a particle and of rigid bodies, Cambridge: University Press, JFM 21.0845.02
  • Loney, SL (1912), An elementary treatise on statics, Cambridge: University Press, JFM 43.0799.06
  • Loney, SL (1912), Plane Trigonometry, Cambridge: University Press, JFM 25.0892.12


  1. ^ "List of Members of The London Mathematical Society" (PDF), Proceedings of the London Mathematical Society, vol. 35, 13 November 1902
  2. ^ Berndt, Bruce C.; Rankin, Robert A. (2000). "The books studied by Ramanujan in India". The American Mathematical Monthly. 107 (7): 595–601. doi:10.1080/00029890.2000.12005244. JSTOR 2589114. S2CID 218544331.
  3. ^ "Loney, Sidney Luxton (LNY878SL)". A Cambridge Alumni Database. University of Cambridge.
  4. ^ "Trigonometry for JEE Main and Advanced". www.acadboost.com. Retrieved 30 March 2022.


  • Harold Simpson (1939), "Sidney Luxton Loney", J. London Math. Soc., s1-14 (3): 240, doi:10.1112/jlms/s1-14.3.240
  • Higgins, E. C. (17 June 1939), "Prof. S. L. Loney", Nature, 143 (3633): 1011–1012, Bibcode:1939Natur.143.1011H, doi:10.1038/1431011a0

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