The Shulbasutras of Baudhayana, Apastamba, Katyayana and Manava: With Text, English Translation and Commentary c8.t13.32

c8.t13.32

The annular space of the felly between this new circle and the outermost one is divided into 64 equal parts and filled with bricks of one type. Each of the 16 spokes extending from the newly drawn inner circle in the nave upto the newly drawn inner circle of the felly is divided into 5 parts and 5 different types of bricks are used. The spokes will thus involve the use of 80 bricks. In between spokes, in the region of the felly, there are 16 spaces, each of which is divided into two equal parts, and 32 bricks of another type are used to fill them up (*arāṇāmantarāleṣu vedīpradeśasamīpe nemyāṁ dve dve iṣṭake / .... tāsāmekaṁ karaṇaṁ / tā dvātriṁśat*—D.). Likewise, there are 16 spaces in the nave between the spokes and outside the inner circle; 16 bricks of another size are used to cover them. The remaining central part of the nave is radially divided into 8 parts and 8 bricks of still another type are employed to cover them. In this way, the total number of 200 (64 + 80 + 32 + 16 + 8) bricks of 9 different types are used. With the 7 types used for the first layer, and 9 for the second 16 different types of bricks are used to construct the fire-altar in the shape of a chariot wheel with spokes.