In 1927 I published in this Journal (3. 71–86) a study on 'The Inflection of the Present Indicative Active in Indo-European.' Since that time, further investigation, particularly along the lines of vocalic alternation (apophony, 'Ablaut'), with its underlying factor of accent, has led me to conclusions which seem to me so much deeper in foundations and, in a measure, so much broader in results that I regard that older discussion as practically supplanted by the one which I now present.