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NOTE XXV. 'UMAR-I-KHAYYAM 137<br />

j/<br />

.<br />

><br />

Malikshah, for the making of which a nvynber of notable astronomers<br />

were assembled, amongst them 'Umar ibn Ibrahim al-Khayyami, Abu'l-<br />

Muzaffar al-Isfizari, Maymun ibnu'n-Najib al-Wasiti, and others. A? great* '<br />

amount of wealth was expended upon it; and the Observatory remained<br />

but after his death<br />

' in use until the King died in A.H. 485 (A. 1)^1092-3),<br />

, it was disusted."<br />

'<br />

*<br />

7. Al-Qifti's Ta'rikhu'l-Hukama.<br />

'<br />

The " History of the Philosophers," composed between A.H. 624 and<br />

646 (A.D. 1227 and 1248-9) by Jamalu'd-Din Abu'l-Hasan 'AH ibn<br />

1<br />

Yiisuf al-Qifti, and edited by Dr Julius LippeVt , also contained a notice<br />

of

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