Robert of Chester's Latin translation of the Algebra of al-Khowarizmi . m D. numeri om. quaternarii D. diuide per vel diuide superpro diuide in saepe. 6. Deinde pro Diuide D. fientque duo et D. quae + scilicet radix. 8. econuerso. super pro in. o. numeri om. D. fientque. nouene earum radicem assume id est duas unius accipe33s pro vnius . . accipe. 10. particulae scilicet om. 13. super. 14. tamen quod substantiam super. 15. quotiens. duplica V; multiplica duplicaD. vel collige om. scito. 16. ex duplicatione concretus radix hunc. 17. primo V; primum D. 18.
Robert of Chester's Latin translation of the Algebra of al-Khowarizmi . m D. numeri om. quaternarii D. diuide per vel diuide superpro diuide in saepe. 6. Deinde pro Diuide D. fientque duo et D. quae + scilicet radix. 8. econuerso. super pro in. o. numeri om. D. fientque. nouene earum radicem assume id est duas unius accipe33s pro vnius . . accipe. 10. particulae scilicet om. 13. super. 14. tamen quod substantiam super. 15. quotiens. duplica V; multiplica duplicaD. vel collige om. scito. 16. ex duplicatione concretus radix hunc. 17. primo V; primum D. 18. Nam + et. ergo om. D. aut plurespro vel quatuor. 19. aut quotquot fuerint, numeri nouenarii ; aut quod volueris, numeri nouenarii D; quot-quot + volueris C sed del. 20. cum omnibus iis om. est. quod diximus et inuenies si deus voluerit. 23. Sed + et. radicem om. D. numeri2 24. Multiplica. 25. quod excreuit. 26. multiplica D. 27. numeri om. fientque 36. numeri om. D. ergo quorum videlicet radix substantiam quamvoluisti THE BOOK OF ALGEBRA AND ALMUCABOLA 101 one-half of 3. For i| taken twice gives You proceed then in thesame manner with such multiplications with all roots, whether they areintegral or fractional. Method of dividing If, moreover, you wish to divide the root of 9 by the root of 4, you divide9 by 4, giving 2j, and the root of this, which is finally i|, completes If you wish to perform the reciprocal division, divide the root of 4by the root of 9, divide 4 by 9, giving f of a unit, and take the root of this, §. This is, of course, the result of the Another method of division You may desire to divide the root of 9 by the root of 4, without dividingthe square by the Double or gather up the root of 9 as many timesas desired and of the resulting number you find the root. This number di-vide by 4 or by any other number by which you wished to divide the firstroot; for in th
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