The Shulbasutras of Baudhayana, Apastamba, Katyayana and Manava: With Text, English Translation and Commentary c8.t12.19

c8.t12.19

**15.3.** *Placement of bricks in the first layer.* *BC* is divided into 18 equal parts and marked and likewise *GH* in 18 equal parts and marked. Lines parallel to *BC* and *GH* are drawn. It is easily seen that the entire area is divided into 144 rectangles where an equal number of *bṛhatī* bricks can be placed and into 36 half rectangles along the sides where an equal number of *ardhyās* can be placed. Thus we get 180 bricks. The deficit is met by replacing 10 B₁s in the 6th vertical row on either side of the central line *GH* by 20 B₂s. With the above substitution, the total number of B₁s is 124 and that of B₂s 76. On these points, the commentary runs as follows : *ṣaṣṭhī dvādaśeṣṭakā | tatra madhyāddaśa bṛhatīrudhṛtya viṃśatirardhyāḥ . . . . asminprastāre caturviṃśatiśataṃ bṛhatyaḥ | ṣaṭsaptatirardhyāḥ |*