AS PRACTISED BY THE ARABS. 87 



t. Add together in the Rank of the Quadratus Cubi this 160 and 32, 

 and write the sum 192 opposite to and immediately above them. 



u. Transfer this 192 one place to the right hand. This 192 so trans- 

 ferred is now the upper number in the Rank of the Quadratus Cubi. 



v. Add 2, the first found figure of the Root to 4, the upper number 

 in the Rank of the Latus by Art. k, and write the sum 6 opposite to and 

 immediately above it. This 6 is now the upper number in the Rank of 

 the Latus. 



w. Multiply 2, the first found figure of the Root into this 6, and write 

 the product 12 in the Rank of the Square opposite to and immediately 

 above 12, the upper number in that Rank by Art. m. 



x. Add together in the Rank of the Square this 12 and 12, and 

 write the sum 24 opposite to and immediately above them. This 24 is 

 now the upper number in the Rank of the Square. 



y. Multiply 2, the first found figure of the Root into this 24, and write 

 the product 48 in the Rank of the Cube opposite to and immediately above 

 32, the upper number in that Rank by Art. p. 



z. Add together in the Rank of the Cube this 48 and 32, and write 

 the Sum 80 opposite to and immediately above them. This 80 is now the 

 upper number in the Rank of the Cube. 



«. Multiply 2, the first found figure of the Root into this 80, and write 

 the product 1G0 in the Rank of the Biquadrate opposite to and immediate- 

 ly above 80, the upper number in that Rank by Art. r. 



