AS PRACTISED BY THE ARABS. 67 



166, 571, 800, 758, 593, 887, 308, 296, 025, 335, 490. (234567 



64 



102, 571, 800 



84, 035, 889 



18, 535, 911, 758, 593 



16, 134, 619, 913, 216 



2, 401, 291, 845, 377, 887, 308 



2, 116, 025, 521, 169, 640, 625 



285, 266, 324, 208, 246, 683, 296, 025 



255, 443, 315, 383, 323, 683, 729, 856 



29, 823, 008, 824, 922, 999, 566, 169, 335, 490 



29, 82 3, 008, 824. 92 2, 999, 565, 181, 681, 169 



987, 654, 321. 



(32.) And the Rule given for its performance is as follows : 



Article (a). Place a dot over the units place and over every succeed- 

 ing 6th figure, counting to the left hand, that is, over the 7th, 13th, 19th, 

 25th, and 31st places. Then beginning at the left hand; call 166 the 

 first period; 571,800 the second period ; 758,593 the third period; and 

 so on. 



(h). Find the nearest approximate 6th Root of the first period 166. 

 This by trial is 2, For 2* — 64 and Z. 166 and 3 6 — 729 and > 166. Write 

 this 2 separated by a semicircle to the right hand of the given number, 

 and call it the first found figure of the Root. 



o 



(c). Call the 6th Power of the first found figure of the Root which 

 is 2 6 = 64, the first Subtrahend. 



