8 HENRY S. WASHINGTON 



the tuff by the impact of the falhng block. The northern slopes of 

 Monte Levante are covered by the scoriae of Monte Vulcano, which 

 adjoins it on the northwest. 



Monte Biancarella, which lies close to the north coast and immedi- 

 ately west of Monte Rosso, is a low, regular dome of yellow tuff, its 

 summit about 50 meters above the base, and the whole about 150 

 meters across. There is no sign of a crater and the thin bedded tuffs 

 dip quaquaversally on all sides, forming concentric, curving sheets, 

 with step-Hke interruptions here and there due to erosion. The 

 appearance is as if horizontal beds of tuff had been gently 

 forced up by some invisible protrusion from below. Close to the 

 south of this are some of the long foundation walls, constructed of 

 blocks of tuff, which probably date from Roman times. They 

 barely' project above the surface. Excavation would be needed to 

 expose them fully and would probably be repaid by some archaeo- 

 logical discoveries of interest, for which, unfortunately, time was 

 lacking. 



The last tuff cone to be described is marked Monte Ponente on 

 all the maps, but seems to be called Monte Pozzolana by the inhabi- 

 tants. As it is a composite cone, being composed both of tuff and 

 lava, we may conveniently reserve the name Monte Pozzolana for 

 the southern, tuffaceous portion, and let Monte Ponente denote 

 specifically the northern, basaltic portion, though there is no oro- 

 graphic distinction between them. This cone is situated on the west 

 coast of Linosa, the sea having cut away its west side and exposed a 

 fine section. Immediately at its foot is the best landing-place of the 

 island, a small cove, with rocky shores and a small artificial jetty, at 

 which only small row boats can land, the steamer stopping about a 

 mile from shore. If the wind is from the north or west, landing must 

 be effected at the Scala Vecchia, a small bay on the south coast, Hke- 

 wise very rocky, and about one-third of a kilometer south of the 

 village. 



Monte Pozzolana consists of thin-bedded, very friable, yellow 

 tuffs, which contain numerous very small fragments of somewhat 

 scoriaceous basalt, but few large blocks, such as were noted at the 

 other tuff cones. Toward the top the tuff mingles with, and is finally 

 covered by, the scoriae of Monte Ponente. In the breach on the 



