216 Dr. Cooper on Volcanoes 
es cube of Lava. Breisl. § 669 note... Suppose for the mo- 
mentthat the disputed district of Auvergne and its vicinity is 
volcanic, there are 35 3 millions of prisms of columnar and 
figurate basalt, according to Soulaive in that district, beside 
amorphous. basalt and cellular basalt, on the surface. Ta- 
king in the depth, he calculates the basaltic matter at two 
thousand one hundred and_ eighty-seven millions of cubic 
feet French. 3 Soul. 348. 
Currents of Lava are often slow. Dolomieu cites one 
which ran but twelve thousand and five hundred, feet in 
two years. M. de Buch however saw one descend from Ve- 
suvius, twenty three thousand feet in three hours and. reach- 
ed the sea. In the eruption of Aitna of 1787, (Atina is six- 
ty miles in circumference) the whole crater was full of La- 
va, which flowed over the top and filled an opening of ten 
thousand feet high, by six thousand feet diameter. . There 
are several mountains of Lava round ALtna, each of them, 
larger than Vesuvius. In the eruption of tna of 1669, the 
Lava flowed for four months afterwards and.was hot eight 
years afterwards. Ferrara’s Hist. of the eruptions of AXtna. 
Journ. de Physique Mai. 1819. Some Lavas from tna 
smoked twenty-six years. S. W. Hamilton thrust a stick 
into a mass of Luava, two leagues from the opening in Vesu- 
vius, three years after it had been ejected, and the stick 
took fire. 
Among voleanic ejections are mud Lavas, (moia.) They 
are noticed by S. W. Hamilton and Spalanzani, both from 
Etna and Vesuvius. Menard de la George says they are 
frequent in volcanoes near the sea. 
The earthquake at Lima in 1746, was accompanied (ac- 
cording to Ulloa) by a mud eruption from Monte de la Con- 
ception at Lucanas, which covered an immense space of 
ground. . According to Humbold in 1698, the. volcanoes 
of Carguarazo near Chimborazo, covered eighteen, square 
leagues with mud. Such also are the eruptionsof Peru 
and Quito. In 1797 the village of Pilleo was inundated 
with a mud eruption, which when dry was combustible. 
(Humbold.) There is a mud volcano at Salsa, at Montegib- 
bio, in the duchy of Modena ; another at Querzola ; anoth- 
er at Mendola ; and another at Sigillo in the Appennines. 
Cadell’s trav. into Carinthia and Italy vol. ii.p.55. A 
mud volcanic mountain at Macalonba in Sicily, (Dolomieu.) 
