[Friedrich Karl].  German philologist, born at Wiesbaden on the 16th of May 1849; educated at the universities of Halle and Leipsic, in which latter he became professor of Sanskrit and comparative philology in 1882. His researches and publications in the field of Indo-European vocalism have done more for the study of philology than had been accomplished for ages. His writings, while scientific and forceful, have the singular advantage of attractive and clear diction. His Morphological Researches in the Domain of Indo-Germanic Languages (4 vols., 1881) and Present Condition of Linguistic Science (1882) are among the standard works from his pen.