942 Extract from the Rekhd Ganita, [Nov. 



3. A superficies has both length and breadth. 



4. There are two kinds of superficies, the one plane as the smooth sur- 

 face of levelled water, the other not plane. 



5. Lines are also of two kinds, straight and curved (or crooked), &c. 

 &c. 



Original Text. 



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