218 Dr. Cooper on Voleanoes 
at Lisbon, Europe, Africa and America, were for some 
time repeatedly agitated by sere 1 Fi explosions. tna, 
which een in a state of profound sy ee for eighty 
years, broke out with great apt nee In 1812, the earth- 
quake of the Caraccas, was followed by the volcanic erup- 
tion of St. Mhcanda before mentioned, in thirty-five days. 
Humb. per. na 
Many clear and indubitabe volcanoes soa in action are 
extinct. There are eleven in Rome and the Campagna of 
Rome, aceoraing’ a 5 Di: Sickle’ s teposraphical view of that 
district, viz. solfaterra. Lake Ga binus, Regillus, Albanus, Ne- 
morensis, near to Ariccia, Juterna, Castella Gandolfo, Nemi, 
San Juliano, Baccono, Brecciano, Lago Morte, Anagni. 
Breislak counted thirty-five extinct voleanoes in the space 
of five or six ¢ leagues by two leagues, about Naples. he 
kivds: The ancient taleaindes of Sidi extend from cae 
Paclino to Mtna, and are covered by, and alternate with, 
shell Limestone : hence they were submarine. To the 
same purpose Mr. Leckie in Bakewell 216, 2d Ed. This 
alternation of submarine volcanic ejections with limestone of 
marine origin is noticed by our own mineralogist Mr. 
M’Clare, in his account of the West-India Islands 3 the facts 
are so curious, that I shall copy them from Acie of the 
Philadelphia Academy of Sciences, p. 142 
Dominica. A bed of coral or Madrepore Tameasihd with 
shells, lies horizontally ona bed of cinders, about two or 
three hundred feet above the level of the seas at Rousseau, 
and is covered by cinders to a considerable height. 
t. Christophers. p. 147. Brimstone hill is a_ stratifica- 
tion of Madrepore limestone ith 4 shells, at an angle of up- 
wards of 50° from the horizon, reposing on a bed of Gk. 
ie cinders, and partly covered by volcanic irruption 
king a fine specimen of the alternation of the Nevis my 
voleanic formations, which for aught we know, may be re- 
peated twenty or thirty times in the foundation of these 
EP enn 
