Page:Great Neapolitan Earthquake of 1857 Vol 2.djvu/81

44 more to the south, than the true wave-path. This somewhat reduced the distance, to which they would otherwise have been thrown from the tower, and the curvature of trajectory a little more; I estimated these both at about one foot additional, to the 16 feet of horizontal throw. Taking the latter at 17 feet, it was obvious that the bells had fallen almost precisely at the angle of emergence, or reverse to the wave direction, and thus we obtain for $$e$$ = 75% or only 4° 30' less, than the maximum angle of emergence given by the monument; and as this coincides very accurately, with the final conclusion arrived at from the calculation of the latter structure, I adopt 75°, with confidence, as the angle of emergence here.

This campanile was founded on the solid limestone, and the complete preservation of all its lower part, to about two-thirds its total height, is an additional confirmation of the great steepness of emergence of the wave here.

Surveyed from the existing top of the walls, the general direction of the valley of the Landro, looking west, is 65° N. of west.

Caggiano is visible from it, and bears 135° W. of north. According to Zannoni's map it bears 165° W. of north, and taking the declination at 15° its bearing should be 150° W. of north. It appears, therefore, to be misplaced upon that map about 5° of azimuth, and as the distance is not above two miles, this would place the town nearly half a mile too far west.