# Page:Great Neapolitan Earthquake of 1857.djvu/148

If in place of the town standing upon pretty level ground, as previously assumed, it stand upon a hill summit, and on its flanks, the difference of devastation, at different sides, is usually great. If, as in Fig. 69, the shock emerge in the direction ${\displaystyle a}$${\displaystyle b}$, the buildings at the right and left, are differently affected, because their grasp upon the ground at their foundations is different, the relative direction of emergence different (as will be more fully examined when