The Shulbasutras of Baudhayana, Apastamba, Katyayana and Manava: With Text, English Translation and Commentary c8.t13.27

c8.t13.27

**16.12-16.14.** *Placement of bricks in the first layer.* The felly (*nemi*) is divided into 64 equal parts. We have seen that the annular space comprising the spokes and the empty spaces was divided into 32 equal parts by radial lines. These are projected into the felly, dividing it at first into 32 equal parts, and each part is then equally divided by radial lines confined between the outer and the inner circumference. Now a concentric circle passing through the middle of these two circumferences of the felly is drawn, dividing its space into 128 parts. Note that the area of each part lying outside the middle circumference is different from that lying within. Accordingly, two types of bricks are required to cover the felly, as D. points out—*bāhyāścatuḥṣaṣṭi | tāsāmekaṁ karaṇam | antataścatuḥṣaṣṭi | tāsāmekaṁ karaṇam |*