Walter_Noel_Hartley
Walter Noel Hartley
British chemist
Sir Walter Noel Hartley FRS FRSE DSc (1845-11 September 1913) was a British 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. In 1881, he hypothesized the presence of ozone in the atmosphere.[2]