History of Indian and Eastern Architecture v1.c19.s2.15

v1.c19.s2.15

triangular stones placed in each angle of the square, as in Woodcut No. 172, thus employing five stones instead of one. By this means, the size of the central stone remaining the same, the side of the square space so roofed is increased in the ratio of ten to seven, the actual area being doubled. The next step in the process (Woodcut No. 173) is by employing three tiers and nine stones, instead of two tiers and five stones, which quadruples the area roofed. Thus, if the central stone is 4 ft., by the second process the space roofed will be about 5 ft. 8 in.; by the third 8 ft. square; by a fourth process (Woodcut No. 174)—with four tiers and thirteen stones