Page:Great Neapolitan Earthquake of 1857.djvu/254

204 occurred, which lasted about twenty-five seconds. They were both undulatory, and proceeded from the south to the north. The severity of the second shock was apparent from the fact, that two pendulum clocks belonging to this  Observatory which oscillated in the plane of the prime  vertical, were stopped, (three others, however, were unaffected). The foundation of the tower in which our equatorial instrument is placed also sustained injury. We were also sensible of three successive but slight shocks,  at three and at five o'clock in the morning (i. e. of the  17th.’”) (See Appendix, No. 3.)

On visiting the Observatory I was unable to converse with the astronomer, Signor de Gasparis, who was unwell, but was shown over the establishment and my inquiries  answered, by Signor Nobili, filio.



In the transit room (Fig. 111) ($$t t$$ being the two