Karl Verner
Verner also made significant contributions to the field of phonetics, including the development of a system for noting the sounds of spoken languages. He published several books on linguistics, including Die Lautgesetze der indogermanischen Sprachen (The Sound Laws of the Indo-European Languages) and Die phonetische Lautlehre der indogermanischen Sprachen (The Phonetic Sound Doctrine of the Indo-European Languages).