256 Gr. Thibaut — On the S'ulvasutras. [No. 3, 



tion to the area which they cover in the primitive agni, only they have to cede 

 in their turn three of the eight quarter bricks, which are employed for the 

 formation of the head. The original area of both wings together being 2£ 

 purushas, their increased area amounts to 2J- -f- If — T 3 7 = 3 Jf square 

 purushas, for one wing to Iff square purushas. 



Nine and a half aratnis ( = 238 afigulis) and three quarters of an an- 

 guli are the length of the wing. 



The breadth of the wing is the same as in the primitive s'yena, i. e., 

 = one purusha = 120 angulis. Dividing the area of the wing mentioned 

 above by the breadth we get the length. Up to this, the wing has the shape 

 of a regular oblong ; the following rules show how to produce the curvature. 



Make ties at both ends of a cord of two purushas length and a mark 

 in its middle. 



Having fastened the two ends of the cord at the two western corners 

 of the oblong forming the wing, take it by the mark and stretch it towards 

 the east ; the same is to be done on the eastern side (i. e., the cord is fast- 

 ened at the two east corners and stretched towards the east). This is the 

 curvature of the wings. 



By stretching the cord, fastened at the west corners, a triangle is form- 

 ed by the west side of the oblong and the two halves of the cord, and this 

 triangle has to be taken away from the area of the wing. In its stead the 

 triangle formed, when the cord is stretched from the eastern corners, is added 

 to the wing. 



Thereby the northern wing is explained. 



The curvature is brought about in the same way. 



The atman is two purushas long, one and a half purushas broad. 



This is not the final area of the atman, as we shall see further on ; but 

 an oblong of the stated dimensions has to be constructed and by cutting 

 pieces from it we get the area we want. 



At the place of the tail stretch a purusha towards the west, with the 

 breadth of half a purusha. 



That means : construct an oblong, measuring one purusha from the 

 east to the west, half a purusha from the north to the south. 



