German philologist, born on the 4th of February 1855, in Bleckede, Germany; studied at Berlin and Göttingen; in 1883 became assistant librarian at Halle, and in that year moved to the United States to take the position of professor of comparative philology at Bryn Mawr College, Pennsylvania. He has been a prolific writer, both in German and English. Among such of his writings as have attracted the most attention are The Relationships of the Greek Dialects; and Modern Philology and the Explanation of the Changes of the Indo-Germanic Vowel.