text: Grassmann also noticed and presented a phonological rule that exists in both Sanskrit and Greek. In his honor, this phonological rule is known as Grassmann's law. His discovery was revolutionary for historical linguistics at the time, as it challenged the widespread notion of Sanskrit as an older predecessor to other Indo-European languages. This was a widespread assumption due to Sanskrit's more agglutinative structure, which languages like Latin and Greek were thought to have passed through to reach their more "modern" synthetic structure. However, Grassman's work proved that, in at least one phonological pattern, German was indeed "older" (i.e., less synthetic) than Sanskrit. This meant that genealogical and typological classifications of languages were at last correctly separated in linguistics, allowing significant progress for later linguists.
  These philological accomplishments were honored during his lifetime. He was elected to the American Oriental Society and in 1876 he received an honorary doctorate from the University of Tübingen.
  Publications
  A1:
  A2:
  1862. Die Ausdehnungslehre. Vollständig und in strenger Form begründet.. Berlin: Enslin.
  English translation, 2000, by Lloyd Kannenberg, Extension Theory, American Mathematical Society ,
  1873. Wörterbuch zum Rig-Veda. Leipzig: Brockhaus.
  1876–1877. Rig-Veda. Leipzig: Brockhaus. Translation in two vols., vol. 1 published 1876, vol. 2 published 1877.
  1894–1911. Gesammelte mathematische und physikalische Werke, in 3 vols. Friedrich Engel ed. Leipzig: B.G. Teubner. Reprinted 1972, New York: Johnson.