Page:Popular Science Monthly Volume 40.djvu/356

342 -looking block, 10 feet long, tapering from 7 feet 10 inches in width at one end to 5 feet 10 inches at the other, with an average thickness of 5 feet, and an approximative weight of about (>0 tons (see Fig. 3).

The peculiarities of this block, which invest it with unusual



interest, are: First, its apparent artificiality; second, the surface on which it rests is so narrow, smooth, and rounded, that, were it not for the blocking of a flat slab of rock (shown in Fig. 4), apparently artificially inserted underneath in exactly the proper