A photograph of 17 small coins (perhaps deureuham from Acheh?). Or. 7129 Biographies of Yemenite scholars, copied by C. van Aren- donk from MS. Berlin no. 9909 f. 80v-94v, and some shorter pieces. *4 exercise-books* Or. 8266 A biography of Aljmad b. AbT'l-Hasan ar-Rifa^ï (d. 578/1182). Abstract from a larger work. Microfilm copy of MS. KBG 117 Arab. p. 90-132, Cat. v. d. Berg p. 104 et sq. F.Or.A28b(4)

15. Arithmetics, algebra et geometria Solution of a geometrical problem. Anon. (4/lOth c.) *f. 95v-101;CCO 1002;Gol. * Or. 168(11) Two geometrical problems by Aljmad b. Muhammad Ibn as - Sura (d. 548/1153), S. I, 857. *p. 241-245;CCO 1006;Gol. * Or. 14(10)

Two trigonometrical problems by Man§ur b. 'All Ibn 'Iraq (d. before 427/1036), S. I, 861. *f. 134r-136r;CCO 1007;Gol. * Or. 168(15) Answers given by Muhammad Ibn al-Laij (c. 400/1009), G.I, 470, to 4 questions put by al-BIrunx. *f. 45r-54r;CCO

1013;Gol. * Or. 168(4) Answer by the same to a question put by Abu Ga'far al- Khazin (d. betw. 350/961 and 360/971). *f 102-108r;CCO 1014;Gol. * Or. 168(12)

On a geometrical problem put by as-Sigazï and al-Kühï, by the same. *f. 108v-115;CCO 1015;Gol. * Treatise on right-angled triangles by the same. *f. 116- 134r;CCO 1016;Gol. * 3 mathematical problems, perhaps also by Ibn al-Lait. *f.89-95r;CCO 1017;GoL* A mathematical problem, perhaps by the same. *f. 85r- 88v;CCO 1018;Gol. * 4 problems of mechanics, solved by an author whose name has been erased. *f. 69-79r;CCO 1019;Gol. * Anon, urgüza on arithmetics.. *p. 164-165;CCO 1020;Gol. *

Or.168(13) Or. 168(14) Or.168(10) Or. 168(9) Or. 168(6) Or.14(lb)