258 G. Thibaut — On the S'ulvasutras. [No. 3, 



brick of the first class lies in the wing ; the second part, an oblong of 24 

 angulis by 15 angulis, lies in the atman. 



From a brick of which the area exceeds by a half the area of that brick 

 the side of which is the fourth part of a purusha (this latter would be 30 

 ang. by 30 ang., the increased brick is 45 ang. by 30 ang.), and divide 

 that part of it which is equal to the brick, the side of which is equal to the 

 fourth part of a purusha, by its diagonal (removing half of it). This is the 

 fourth class. 



We get a trapezium, the sides of which are equal to 15 ang., 30 ang., 

 45 ang. and, in the language of the sutras, to the savis'esha of 30 ( = 

 a/ 1800) ; they would have put this last side equal to 42-f-f angulis and 

 very likely have expressed the fraction as 14 tilas. 



Bricks which are equal to the half of those of which the side is the 

 fourth of a purusha, form the fifth class. Oblongs of 30 ang. by 15 ang. 



The division of the above bricks by the diagonal produces bricks of the 

 sixth class. 



Rectangular triangles (the sides : 30 ang., 15 ang., */ 1125.) 



Draw an oblong the length of which from the east to the west is the 

 fifth part of a purusha ( = 24 angulis) and the breadth the tenth part 

 (12 ang.) ; to the north and the south of this oblong draw two other 

 oblongs, and divide those by the diagonals dividing their south-western 

 corners. This is the seventh class. 



We get the rhomboidical bricks employed in the second layer on both 

 sides of the tail. Two of their sides are = 24 ang., the two others = 

 ^/720. 



In the same way another description of bricks is formed ; only this 

 time the oblong on the north side has to be divided by the (other) diagonal 

 which divides the northern (north-western) corner. This is the eighth class. 



Result : the trapeziums employed in the middle of the tail in the 

 second layer. 



The ninth description of bricks is got by dividing a square brick the 

 side of which is equal to the fourth part of a purusha, by both diagonals 

 (into four triangles). 



