ɪn wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd ˈeɪɾi nˈaɪn hiː pɹˈuːvd ɐn ˈɜːli dᵻskɹˈɪpʃən ʌv skˈɪn lˈiːʒənz ɐsˈoʊsɪˌeɪɾᵻd wɪð sˌɑːɹkɔɪdˈoʊsɪs, ˌɪntɹədˈuːsɪŋ ðə nˈeɪm "lˈuːpəs pˈɜːnɪˌoʊ".
In 1889 he proved an early description of skin lesions associated with sarcoidosis, introducing the name "lupus pernio".