326 On Atmospheric Deposits 
directions. Thus they fell thick at Naples, producing 
darkness in the city, but were occasionally dispersed by 
the increasing sea-wind, which spread them over the 
Campagua Felice. Thus, on the 15th June, the Earl of 
Bristol witnessed at Siena a shower of Vesuvian matters, 
in the shape of lava pebbles, over seven or eight miles of 
country; the distance from the mountain being 250 
miles to the N. W. Professor Santi witnessed the same 
at Pienza.* On the 18th June, the ashes fell so thickly 
at Taranto, 250, and at Lecce, 300 miles west of it, that 
the Archbishop of Taranto thought they came from 
Etna or Stromboli. At Caserte, 15 miles N., on the 
19th, candles were obliged to be used at mid-day. The 
winds in this case were probably circular , but strongest 
from west points. 
In August, 1799, cinders and stones weighing 2 ounces 
fell at Benevento, Foggia, and at Monte Mileto, 30 
miles N. E, of Vesuvius ; cinders of an ounce weight, 
ten miles further, and ashes, in considerable showers, on 
the Adriatic Coast, at Manfredonia, two hours after the 
eruption, thus having travelled 50 miles per hour . There 
was but little surface wind, and that was from S. W.+ 
In 1812, ashes from St. Vincent, then in eruption, fell 
at Barbados, and at 130 leagues distant, in the direct 
teeth of the trade wind.% I met some years ago, at 
Havre de Grace, several American ship-masters, who 
detailed to me the particulars, which appeared to agree 
with those observed during the showers of ashes 
experienced at times between the West Indies and Cape 
Verde. The noise was heard in Demerara and St. Kitts.§ 
During the eruption of Tomboro, in the Island of 
* Starke’s Information for Travellers, p. 310 (note). 
t Sir W. Hamilton, Phil. Trans. 1780. 
J Phil. Mag., iv. 343. 
§ Poulett Scrope on Volcanoes. 
