Sir Walter Noel Hartley FRS FRSE DSc (1845-11 September 1913) was an English chemist.
He was a pioneer of spectroscopy, and the first person to establish a relationship between the wavelengths of spectral lines of the elements and their positions in the periodic table[1] (published in 1883), and he studied also the relationship between the structure and spectra of a wide variety of organic compounds.
[2] He was born in Lichfield in Staffordshire on 3 February 1847, the son of Thomas Hartley a portrait painter and his wife, Caroline Lockwood.
[6] His work also led to his election to Fellowship of the Royal Society in 1884, and he was awarded an honorary doctorate (D.Sc.)
[4][10] He was survived by one son, Walter John Hartley, who died whilst serving in the British Army during the First World War at Gallipoli in 1915.