396 APPENDIX TO THE THIRD EDITION CHAPTER V § 9 (p. 256)* The instrumental singular termination - ena of the a-declension is the subject of a detailed study by C. Hauri: Zur V orgeschichte des Ausgangs - ena des Instr. Sing, der a- stamme des Altindischen , Gottingen, 1963. CHAPTER VI § 1. The most recent comprehensive study of the Indo-Euro- pean numerals is by O. Szemerenyi: Studies in the Indo- European system of numerals , Heidelberg, 1960* § 2 (p. 268, 11 . 33-34). The question as to whether Prakrit se is to be directly compared with the Iranian words quoted in this section has long been a matter of dispute. The subject has recently been exhaustively discussed by M. Seheller; Das mittelindische Enklitikum se , KZ, 81, pp. 1-53. He comes to the conclusion that Pkt, se is a secondary development from un- accented asya. CHAPTER VII § 2 (p. 298 ff.). On the Indo-European (and Sanskrit) moods, see J. Gonda, The character of the Indo-European moods , Wies- baden, 1956. (p. 299). The use of the Vedic Injunctive has been exhaus- tively examined and discussed by K. Hoffman: Der Injunktiv im Veda, Heidelberg, 1967. § 3 (P* 302). The question of multiple presents formed from Sanskrit roots has been discussed by J. Vekerdi: On poly- morphic presents in the Rgveda, Acta Orientalia Acadentiae Scientiarum Hungaricae 12, pp. 249-287, Budapest, 1955. §9. On the periphrastic future see now J. Gonda, A critical survey of the publications on the periphrastic future in Sanskrit, Lingua, 6; 15&-179, §10. The Sanskrit aorist has been studied by.T. J. Elari-
