Page:Great Neapolitan Earthquake of 1857.djvu/334

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the mass of rubbish upon the ground, I found made an angle of 60° with the level ground. This is, therefore, about the angle of emergence; but as the roof received a small amount of nearly horizontal motion at its centre of gravity before it began to descend, this angle is a little too small, and so it may be taken as about 62° to 64°, coinciding as thus separately determined, with the emergence as given by the tiles projected from the tower.

The villa stands upon deep clay, upon the north side of the Auletta valley, the land sloping gradually southwards with a rolling surface, and behind it still further north, the limestone mountains (apparently Apennine limestone) rise with a flowing sweep to perhaps 1,500 feet, with bedding nearly parallel to the face of the slope, and a strike in the line of the axis of the valley, or E. and W. and north of E. The calcareous breccia is probably the rock directly under the clay on which it stands, however.

By barometer I find the ground at the villa is about 110 feet above the summit of Auletta. Returning from the villa to Auletta, a good view is afforded to the N. W. and W. down the great valley, which I sketched. Castelluccio is visible, perched upon its summit in the centre, and the lower ranges of the shaggy wooded precipices upon the north flank of Monte Alburno, block up the left of the view. Contursi is just visible upon another very distant height upon the right, () and the villa Carusso is seen at the roadside at (). I proceeded on to

Pertosa.—It also stands upon the top of a mound, less lofty and steep than Auletta, and not so elongated in form. The longer axis is on the whole transverse to the course of the Tanagro, or about 30° E. of N. The steep side,